app/node_modules/markdown-it/dist/markdown-it.js

/*! markdown-it 14.1.0 https://github.com/markdown-it/markdown-it @license MIT */
(function(global, factory) {
  typeof exports === "object" && typeof module !== "undefined" ? module.exports = factory() : typeof define === "function" && define.amd ? define(factory) : (global = typeof globalThis !== "undefined" ? globalThis : global || self, 
  global.markdownit = factory());
})(this, (function() {
  "use strict";
  /* eslint-disable no-bitwise */  const decodeCache = {};
  function getDecodeCache(exclude) {
    let cache = decodeCache[exclude];
    if (cache) {
      return cache;
    }
    cache = decodeCache[exclude] = [];
    for (let i = 0; i < 128; i++) {
      const ch = String.fromCharCode(i);
      cache.push(ch);
    }
    for (let i = 0; i < exclude.length; i++) {
      const ch = exclude.charCodeAt(i);
      cache[ch] = "%" + ("0" + ch.toString(16).toUpperCase()).slice(-2);
    }
    return cache;
  }
  // Decode percent-encoded string.
  
    function decode$1(string, exclude) {
    if (typeof exclude !== "string") {
      exclude = decode$1.defaultChars;
    }
    const cache = getDecodeCache(exclude);
    return string.replace(/(%[a-f0-9]{2})+/gi, (function(seq) {
      let result = "";
      for (let i = 0, l = seq.length; i < l; i += 3) {
        const b1 = parseInt(seq.slice(i + 1, i + 3), 16);
        if (b1 < 128) {
          result += cache[b1];
          continue;
        }
        if ((b1 & 224) === 192 && i + 3 < l) {
          // 110xxxxx 10xxxxxx
          const b2 = parseInt(seq.slice(i + 4, i + 6), 16);
          if ((b2 & 192) === 128) {
            const chr = b1 << 6 & 1984 | b2 & 63;
            if (chr < 128) {
              result += "\ufffd\ufffd";
            } else {
              result += String.fromCharCode(chr);
            }
            i += 3;
            continue;
          }
        }
        if ((b1 & 240) === 224 && i + 6 < l) {
          // 1110xxxx 10xxxxxx 10xxxxxx
          const b2 = parseInt(seq.slice(i + 4, i + 6), 16);
          const b3 = parseInt(seq.slice(i + 7, i + 9), 16);
          if ((b2 & 192) === 128 && (b3 & 192) === 128) {
            const chr = b1 << 12 & 61440 | b2 << 6 & 4032 | b3 & 63;
            if (chr < 2048 || chr >= 55296 && chr <= 57343) {
              result += "\ufffd\ufffd\ufffd";
            } else {
              result += String.fromCharCode(chr);
            }
            i += 6;
            continue;
          }
        }
        if ((b1 & 248) === 240 && i + 9 < l) {
          // 111110xx 10xxxxxx 10xxxxxx 10xxxxxx
          const b2 = parseInt(seq.slice(i + 4, i + 6), 16);
          const b3 = parseInt(seq.slice(i + 7, i + 9), 16);
          const b4 = parseInt(seq.slice(i + 10, i + 12), 16);
          if ((b2 & 192) === 128 && (b3 & 192) === 128 && (b4 & 192) === 128) {
            let chr = b1 << 18 & 1835008 | b2 << 12 & 258048 | b3 << 6 & 4032 | b4 & 63;
            if (chr < 65536 || chr > 1114111) {
              result += "\ufffd\ufffd\ufffd\ufffd";
            } else {
              chr -= 65536;
              result += String.fromCharCode(55296 + (chr >> 10), 56320 + (chr & 1023));
            }
            i += 9;
            continue;
          }
        }
        result += "\ufffd";
      }
      return result;
    }));
  }
  decode$1.defaultChars = ";/?:@&=+$,#";
  decode$1.componentChars = "";
  const encodeCache = {};
  // Create a lookup array where anything but characters in `chars` string
  // and alphanumeric chars is percent-encoded.
  
    function getEncodeCache(exclude) {
    let cache = encodeCache[exclude];
    if (cache) {
      return cache;
    }
    cache = encodeCache[exclude] = [];
    for (let i = 0; i < 128; i++) {
      const ch = String.fromCharCode(i);
      if (/^[0-9a-z]$/i.test(ch)) {
        // always allow unencoded alphanumeric characters
        cache.push(ch);
      } else {
        cache.push("%" + ("0" + i.toString(16).toUpperCase()).slice(-2));
      }
    }
    for (let i = 0; i < exclude.length; i++) {
      cache[exclude.charCodeAt(i)] = exclude[i];
    }
    return cache;
  }
  // Encode unsafe characters with percent-encoding, skipping already
  // encoded sequences.
  
  //  - string       - string to encode
  //  - exclude      - list of characters to ignore (in addition to a-zA-Z0-9)
  //  - keepEscaped  - don't encode '%' in a correct escape sequence (default: true)
  
    function encode$1(string, exclude, keepEscaped) {
    if (typeof exclude !== "string") {
      // encode(string, keepEscaped)
      keepEscaped = exclude;
      exclude = encode$1.defaultChars;
    }
    if (typeof keepEscaped === "undefined") {
      keepEscaped = true;
    }
    const cache = getEncodeCache(exclude);
    let result = "";
    for (let i = 0, l = string.length; i < l; i++) {
      const code = string.charCodeAt(i);
      if (keepEscaped && code === 37 /* % */ && i + 2 < l) {
        if (/^[0-9a-f]{2}$/i.test(string.slice(i + 1, i + 3))) {
          result += string.slice(i, i + 3);
          i += 2;
          continue;
        }
      }
      if (code < 128) {
        result += cache[code];
        continue;
      }
      if (code >= 55296 && code <= 57343) {
        if (code >= 55296 && code <= 56319 && i + 1 < l) {
          const nextCode = string.charCodeAt(i + 1);
          if (nextCode >= 56320 && nextCode <= 57343) {
            result += encodeURIComponent(string[i] + string[i + 1]);
            i++;
            continue;
          }
        }
        result += "%EF%BF%BD";
        continue;
      }
      result += encodeURIComponent(string[i]);
    }
    return result;
  }
  encode$1.defaultChars = ";/?:@&=+$,-_.!~*'()#";
  encode$1.componentChars = "-_.!~*'()";
  function format(url) {
    let result = "";
    result += url.protocol || "";
    result += url.slashes ? "//" : "";
    result += url.auth ? url.auth + "@" : "";
    if (url.hostname && url.hostname.indexOf(":") !== -1) {
      // ipv6 address
      result += "[" + url.hostname + "]";
    } else {
      result += url.hostname || "";
    }
    result += url.port ? ":" + url.port : "";
    result += url.pathname || "";
    result += url.search || "";
    result += url.hash || "";
    return result;
  }
  // Copyright Joyent, Inc. and other Node contributors.
  
  // Permission is hereby granted, free of charge, to any person obtaining a
  // copy of this software and associated documentation files (the
  // "Software"), to deal in the Software without restriction, including
  // without limitation the rights to use, copy, modify, merge, publish,
  // distribute, sublicense, and/or sell copies of the Software, and to permit
  // persons to whom the Software is furnished to do so, subject to the
  // following conditions:
  
  // The above copyright notice and this permission notice shall be included
  // in all copies or substantial portions of the Software.
  
  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  // OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
  // NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
  // DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  // OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  // USE OR OTHER DEALINGS IN THE SOFTWARE.
  
  // Changes from joyent/node:
  
  // 1. No leading slash in paths,
  //    e.g. in `url.parse('http://foo?bar')` pathname is ``, not `/`
  
  // 2. Backslashes are not replaced with slashes,
  //    so `http:\\example.org\` is treated like a relative path
  
  // 3. Trailing colon is treated like a part of the path,
  //    i.e. in `http://example.org:foo` pathname is `:foo`
  
  // 4. Nothing is URL-encoded in the resulting object,
  //    (in joyent/node some chars in auth and paths are encoded)
  
  // 5. `url.parse()` does not have `parseQueryString` argument
  
  // 6. Removed extraneous result properties: `host`, `path`, `query`, etc.,
  //    which can be constructed using other parts of the url.
  
    function Url() {
    this.protocol = null;
    this.slashes = null;
    this.auth = null;
    this.port = null;
    this.hostname = null;
    this.hash = null;
    this.search = null;
    this.pathname = null;
  }
  // Reference: RFC 3986, RFC 1808, RFC 2396
  // define these here so at least they only have to be
  // compiled once on the first module load.
    const protocolPattern = /^([a-z0-9.+-]+:)/i;
  const portPattern = /:[0-9]*$/;
  // Special case for a simple path URL
  /* eslint-disable-next-line no-useless-escape */  const simplePathPattern = /^(\/\/?(?!\/)[^\?\s]*)(\?[^\s]*)?$/;
  // RFC 2396: characters reserved for delimiting URLs.
  // We actually just auto-escape these.
    const delims = [ "<", ">", '"', "`", " ", "\r", "\n", "\t" ];
  // RFC 2396: characters not allowed for various reasons.
    const unwise = [ "{", "}", "|", "\\", "^", "`" ].concat(delims);
  // Allowed by RFCs, but cause of XSS attacks.  Always escape these.
    const autoEscape = [ "'" ].concat(unwise);
  // Characters that are never ever allowed in a hostname.
  // Note that any invalid chars are also handled, but these
  // are the ones that are *expected* to be seen, so we fast-path
  // them.
    const nonHostChars = [ "%", "/", "?", ";", "#" ].concat(autoEscape);
  const hostEndingChars = [ "/", "?", "#" ];
  const hostnameMaxLen = 255;
  const hostnamePartPattern = /^[+a-z0-9A-Z_-]{0,63}$/;
  const hostnamePartStart = /^([+a-z0-9A-Z_-]{0,63})(.*)$/;
  // protocols that can allow "unsafe" and "unwise" chars.
  // protocols that never have a hostname.
    const hostlessProtocol = {
    javascript: true,
    "javascript:": true
  };
  // protocols that always contain a // bit.
    const slashedProtocol = {
    http: true,
    https: true,
    ftp: true,
    gopher: true,
    file: true,
    "http:": true,
    "https:": true,
    "ftp:": true,
    "gopher:": true,
    "file:": true
  };
  function urlParse(url, slashesDenoteHost) {
    if (url && url instanceof Url) return url;
    const u = new Url;
    u.parse(url, slashesDenoteHost);
    return u;
  }
  Url.prototype.parse = function(url, slashesDenoteHost) {
    let lowerProto, hec, slashes;
    let rest = url;
    // trim before proceeding.
    // This is to support parse stuff like "  http://foo.com  \n"
        rest = rest.trim();
    if (!slashesDenoteHost && url.split("#").length === 1) {
      // Try fast path regexp
      const simplePath = simplePathPattern.exec(rest);
      if (simplePath) {
        this.pathname = simplePath[1];
        if (simplePath[2]) {
          this.search = simplePath[2];
        }
        return this;
      }
    }
    let proto = protocolPattern.exec(rest);
    if (proto) {
      proto = proto[0];
      lowerProto = proto.toLowerCase();
      this.protocol = proto;
      rest = rest.substr(proto.length);
    }
    // figure out if it's got a host
    // user@server is *always* interpreted as a hostname, and url
    // resolution will treat //foo/bar as host=foo,path=bar because that's
    // how the browser resolves relative URLs.
    /* eslint-disable-next-line no-useless-escape */    if (slashesDenoteHost || proto || rest.match(/^\/\/[^@\/]+@[^@\/]+/)) {
      slashes = rest.substr(0, 2) === "//";
      if (slashes && !(proto && hostlessProtocol[proto])) {
        rest = rest.substr(2);
        this.slashes = true;
      }
    }
    if (!hostlessProtocol[proto] && (slashes || proto && !slashedProtocol[proto])) {
      // there's a hostname.
      // the first instance of /, ?, ;, or # ends the host.
      // If there is an @ in the hostname, then non-host chars *are* allowed
      // to the left of the last @ sign, unless some host-ending character
      // comes *before* the @-sign.
      // URLs are obnoxious.
      // ex:
      // http://a@b@c/ => user:a@b host:c
      // http://a@b?@c => user:a host:c path:/?@c
      // v0.12 TODO(isaacs): This is not quite how Chrome does things.
      // Review our test case against browsers more comprehensively.
      // find the first instance of any hostEndingChars
      let hostEnd = -1;
      for (let i = 0; i < hostEndingChars.length; i++) {
        hec = rest.indexOf(hostEndingChars[i]);
        if (hec !== -1 && (hostEnd === -1 || hec < hostEnd)) {
          hostEnd = hec;
        }
      }
      // at this point, either we have an explicit point where the
      // auth portion cannot go past, or the last @ char is the decider.
            let auth, atSign;
      if (hostEnd === -1) {
        // atSign can be anywhere.
        atSign = rest.lastIndexOf("@");
      } else {
        // atSign must be in auth portion.
        // http://a@b/c@d => host:b auth:a path:/c@d
        atSign = rest.lastIndexOf("@", hostEnd);
      }
      // Now we have a portion which is definitely the auth.
      // Pull that off.
            if (atSign !== -1) {
        auth = rest.slice(0, atSign);
        rest = rest.slice(atSign + 1);
        this.auth = auth;
      }
      // the host is the remaining to the left of the first non-host char
            hostEnd = -1;
      for (let i = 0; i < nonHostChars.length; i++) {
        hec = rest.indexOf(nonHostChars[i]);
        if (hec !== -1 && (hostEnd === -1 || hec < hostEnd)) {
          hostEnd = hec;
        }
      }
      // if we still have not hit it, then the entire thing is a host.
            if (hostEnd === -1) {
        hostEnd = rest.length;
      }
      if (rest[hostEnd - 1] === ":") {
        hostEnd--;
      }
      const host = rest.slice(0, hostEnd);
      rest = rest.slice(hostEnd);
      // pull out port.
            this.parseHost(host);
      // we've indicated that there is a hostname,
      // so even if it's empty, it has to be present.
            this.hostname = this.hostname || "";
      // if hostname begins with [ and ends with ]
      // assume that it's an IPv6 address.
            const ipv6Hostname = this.hostname[0] === "[" && this.hostname[this.hostname.length - 1] === "]";
      // validate a little.
            if (!ipv6Hostname) {
        const hostparts = this.hostname.split(/\./);
        for (let i = 0, l = hostparts.length; i < l; i++) {
          const part = hostparts[i];
          if (!part) {
            continue;
          }
          if (!part.match(hostnamePartPattern)) {
            let newpart = "";
            for (let j = 0, k = part.length; j < k; j++) {
              if (part.charCodeAt(j) > 127) {
                // we replace non-ASCII char with a temporary placeholder
                // we need this to make sure size of hostname is not
                // broken by replacing non-ASCII by nothing
                newpart += "x";
              } else {
                newpart += part[j];
              }
            }
            // we test again with ASCII char only
                        if (!newpart.match(hostnamePartPattern)) {
              const validParts = hostparts.slice(0, i);
              const notHost = hostparts.slice(i + 1);
              const bit = part.match(hostnamePartStart);
              if (bit) {
                validParts.push(bit[1]);
                notHost.unshift(bit[2]);
              }
              if (notHost.length) {
                rest = notHost.join(".") + rest;
              }
              this.hostname = validParts.join(".");
              break;
            }
          }
        }
      }
      if (this.hostname.length > hostnameMaxLen) {
        this.hostname = "";
      }
      // strip [ and ] from the hostname
      // the host field still retains them, though
            if (ipv6Hostname) {
        this.hostname = this.hostname.substr(1, this.hostname.length - 2);
      }
    }
    // chop off from the tail first.
        const hash = rest.indexOf("#");
    if (hash !== -1) {
      // got a fragment string.
      this.hash = rest.substr(hash);
      rest = rest.slice(0, hash);
    }
    const qm = rest.indexOf("?");
    if (qm !== -1) {
      this.search = rest.substr(qm);
      rest = rest.slice(0, qm);
    }
    if (rest) {
      this.pathname = rest;
    }
    if (slashedProtocol[lowerProto] && this.hostname && !this.pathname) {
      this.pathname = "";
    }
    return this;
  };
  Url.prototype.parseHost = function(host) {
    let port = portPattern.exec(host);
    if (port) {
      port = port[0];
      if (port !== ":") {
        this.port = port.substr(1);
      }
      host = host.substr(0, host.length - port.length);
    }
    if (host) {
      this.hostname = host;
    }
  };
  var mdurl =  Object.freeze({
    __proto__: null,
    decode: decode$1,
    encode: encode$1,
    format: format,
    parse: urlParse
  });
  var Any = /[\0-\uD7FF\uE000-\uFFFF]|[\uD800-\uDBFF][\uDC00-\uDFFF]|[\uD800-\uDBFF](?![\uDC00-\uDFFF])|(?:[^\uD800-\uDBFF]|^)[\uDC00-\uDFFF]/;
  var Cc = /[\0-\x1F\x7F-\x9F]/;
  var regex$1 = /[\xAD\u0600-\u0605\u061C\u06DD\u070F\u0890\u0891\u08E2\u180E\u200B-\u200F\u202A-\u202E\u2060-\u2064\u2066-\u206F\uFEFF\uFFF9-\uFFFB]|\uD804[\uDCBD\uDCCD]|\uD80D[\uDC30-\uDC3F]|\uD82F[\uDCA0-\uDCA3]|\uD834[\uDD73-\uDD7A]|\uDB40[\uDC01\uDC20-\uDC7F]/;
  var P = /[!-#%-\*,-\/:;\?@\[-\]_\{\}\xA1\xA7\xAB\xB6\xB7\xBB\xBF\u037E\u0387\u055A-\u055F\u0589\u058A\u05BE\u05C0\u05C3\u05C6\u05F3\u05F4\u0609\u060A\u060C\u060D\u061B\u061D-\u061F\u066A-\u066D\u06D4\u0700-\u070D\u07F7-\u07F9\u0830-\u083E\u085E\u0964\u0965\u0970\u09FD\u0A76\u0AF0\u0C77\u0C84\u0DF4\u0E4F\u0E5A\u0E5B\u0F04-\u0F12\u0F14\u0F3A-\u0F3D\u0F85\u0FD0-\u0FD4\u0FD9\u0FDA\u104A-\u104F\u10FB\u1360-\u1368\u1400\u166E\u169B\u169C\u16EB-\u16ED\u1735\u1736\u17D4-\u17D6\u17D8-\u17DA\u1800-\u180A\u1944\u1945\u1A1E\u1A1F\u1AA0-\u1AA6\u1AA8-\u1AAD\u1B5A-\u1B60\u1B7D\u1B7E\u1BFC-\u1BFF\u1C3B-\u1C3F\u1C7E\u1C7F\u1CC0-\u1CC7\u1CD3\u2010-\u2027\u2030-\u2043\u2045-\u2051\u2053-\u205E\u207D\u207E\u208D\u208E\u2308-\u230B\u2329\u232A\u2768-\u2775\u27C5\u27C6\u27E6-\u27EF\u2983-\u2998\u29D8-\u29DB\u29FC\u29FD\u2CF9-\u2CFC\u2CFE\u2CFF\u2D70\u2E00-\u2E2E\u2E30-\u2E4F\u2E52-\u2E5D\u3001-\u3003\u3008-\u3011\u3014-\u301F\u3030\u303D\u30A0\u30FB\uA4FE\uA4FF\uA60D-\uA60F\uA673\uA67E\uA6F2-\uA6F7\uA874-\uA877\uA8CE\uA8CF\uA8F8-\uA8FA\uA8FC\uA92E\uA92F\uA95F\uA9C1-\uA9CD\uA9DE\uA9DF\uAA5C-\uAA5F\uAADE\uAADF\uAAF0\uAAF1\uABEB\uFD3E\uFD3F\uFE10-\uFE19\uFE30-\uFE52\uFE54-\uFE61\uFE63\uFE68\uFE6A\uFE6B\uFF01-\uFF03\uFF05-\uFF0A\uFF0C-\uFF0F\uFF1A\uFF1B\uFF1F\uFF20\uFF3B-\uFF3D\uFF3F\uFF5B\uFF5D\uFF5F-\uFF65]|\uD800[\uDD00-\uDD02\uDF9F\uDFD0]|\uD801\uDD6F|\uD802[\uDC57\uDD1F\uDD3F\uDE50-\uDE58\uDE7F\uDEF0-\uDEF6\uDF39-\uDF3F\uDF99-\uDF9C]|\uD803[\uDEAD\uDF55-\uDF59\uDF86-\uDF89]|\uD804[\uDC47-\uDC4D\uDCBB\uDCBC\uDCBE-\uDCC1\uDD40-\uDD43\uDD74\uDD75\uDDC5-\uDDC8\uDDCD\uDDDB\uDDDD-\uDDDF\uDE38-\uDE3D\uDEA9]|\uD805[\uDC4B-\uDC4F\uDC5A\uDC5B\uDC5D\uDCC6\uDDC1-\uDDD7\uDE41-\uDE43\uDE60-\uDE6C\uDEB9\uDF3C-\uDF3E]|\uD806[\uDC3B\uDD44-\uDD46\uDDE2\uDE3F-\uDE46\uDE9A-\uDE9C\uDE9E-\uDEA2\uDF00-\uDF09]|\uD807[\uDC41-\uDC45\uDC70\uDC71\uDEF7\uDEF8\uDF43-\uDF4F\uDFFF]|\uD809[\uDC70-\uDC74]|\uD80B[\uDFF1\uDFF2]|\uD81A[\uDE6E\uDE6F\uDEF5\uDF37-\uDF3B\uDF44]|\uD81B[\uDE97-\uDE9A\uDFE2]|\uD82F\uDC9F|\uD836[\uDE87-\uDE8B]|\uD83A[\uDD5E\uDD5F]/;
  var regex = /[\$\+<->\^`\|~\xA2-\xA6\xA8\xA9\xAC\xAE-\xB1\xB4\xB8\xD7\xF7\u02C2-\u02C5\u02D2-\u02DF\u02E5-\u02EB\u02ED\u02EF-\u02FF\u0375\u0384\u0385\u03F6\u0482\u058D-\u058F\u0606-\u0608\u060B\u060E\u060F\u06DE\u06E9\u06FD\u06FE\u07F6\u07FE\u07FF\u0888\u09F2\u09F3\u09FA\u09FB\u0AF1\u0B70\u0BF3-\u0BFA\u0C7F\u0D4F\u0D79\u0E3F\u0F01-\u0F03\u0F13\u0F15-\u0F17\u0F1A-\u0F1F\u0F34\u0F36\u0F38\u0FBE-\u0FC5\u0FC7-\u0FCC\u0FCE\u0FCF\u0FD5-\u0FD8\u109E\u109F\u1390-\u1399\u166D\u17DB\u1940\u19DE-\u19FF\u1B61-\u1B6A\u1B74-\u1B7C\u1FBD\u1FBF-\u1FC1\u1FCD-\u1FCF\u1FDD-\u1FDF\u1FED-\u1FEF\u1FFD\u1FFE\u2044\u2052\u207A-\u207C\u208A-\u208C\u20A0-\u20C0\u2100\u2101\u2103-\u2106\u2108\u2109\u2114\u2116-\u2118\u211E-\u2123\u2125\u2127\u2129\u212E\u213A\u213B\u2140-\u2144\u214A-\u214D\u214F\u218A\u218B\u2190-\u2307\u230C-\u2328\u232B-\u2426\u2440-\u244A\u249C-\u24E9\u2500-\u2767\u2794-\u27C4\u27C7-\u27E5\u27F0-\u2982\u2999-\u29D7\u29DC-\u29FB\u29FE-\u2B73\u2B76-\u2B95\u2B97-\u2BFF\u2CE5-\u2CEA\u2E50\u2E51\u2E80-\u2E99\u2E9B-\u2EF3\u2F00-\u2FD5\u2FF0-\u2FFF\u3004\u3012\u3013\u3020\u3036\u3037\u303E\u303F\u309B\u309C\u3190\u3191\u3196-\u319F\u31C0-\u31E3\u31EF\u3200-\u321E\u322A-\u3247\u3250\u3260-\u327F\u328A-\u32B0\u32C0-\u33FF\u4DC0-\u4DFF\uA490-\uA4C6\uA700-\uA716\uA720\uA721\uA789\uA78A\uA828-\uA82B\uA836-\uA839\uAA77-\uAA79\uAB5B\uAB6A\uAB6B\uFB29\uFBB2-\uFBC2\uFD40-\uFD4F\uFDCF\uFDFC-\uFDFF\uFE62\uFE64-\uFE66\uFE69\uFF04\uFF0B\uFF1C-\uFF1E\uFF3E\uFF40\uFF5C\uFF5E\uFFE0-\uFFE6\uFFE8-\uFFEE\uFFFC\uFFFD]|\uD800[\uDD37-\uDD3F\uDD79-\uDD89\uDD8C-\uDD8E\uDD90-\uDD9C\uDDA0\uDDD0-\uDDFC]|\uD802[\uDC77\uDC78\uDEC8]|\uD805\uDF3F|\uD807[\uDFD5-\uDFF1]|\uD81A[\uDF3C-\uDF3F\uDF45]|\uD82F\uDC9C|\uD833[\uDF50-\uDFC3]|\uD834[\uDC00-\uDCF5\uDD00-\uDD26\uDD29-\uDD64\uDD6A-\uDD6C\uDD83\uDD84\uDD8C-\uDDA9\uDDAE-\uDDEA\uDE00-\uDE41\uDE45\uDF00-\uDF56]|\uD835[\uDEC1\uDEDB\uDEFB\uDF15\uDF35\uDF4F\uDF6F\uDF89\uDFA9\uDFC3]|\uD836[\uDC00-\uDDFF\uDE37-\uDE3A\uDE6D-\uDE74\uDE76-\uDE83\uDE85\uDE86]|\uD838[\uDD4F\uDEFF]|\uD83B[\uDCAC\uDCB0\uDD2E\uDEF0\uDEF1]|\uD83C[\uDC00-\uDC2B\uDC30-\uDC93\uDCA0-\uDCAE\uDCB1-\uDCBF\uDCC1-\uDCCF\uDCD1-\uDCF5\uDD0D-\uDDAD\uDDE6-\uDE02\uDE10-\uDE3B\uDE40-\uDE48\uDE50\uDE51\uDE60-\uDE65\uDF00-\uDFFF]|\uD83D[\uDC00-\uDED7\uDEDC-\uDEEC\uDEF0-\uDEFC\uDF00-\uDF76\uDF7B-\uDFD9\uDFE0-\uDFEB\uDFF0]|\uD83E[\uDC00-\uDC0B\uDC10-\uDC47\uDC50-\uDC59\uDC60-\uDC87\uDC90-\uDCAD\uDCB0\uDCB1\uDD00-\uDE53\uDE60-\uDE6D\uDE70-\uDE7C\uDE80-\uDE88\uDE90-\uDEBD\uDEBF-\uDEC5\uDECE-\uDEDB\uDEE0-\uDEE8\uDEF0-\uDEF8\uDF00-\uDF92\uDF94-\uDFCA]/;
  var Z = /[ \xA0\u1680\u2000-\u200A\u2028\u2029\u202F\u205F\u3000]/;
  var ucmicro =  Object.freeze({
    __proto__: null,
    Any: Any,
    Cc: Cc,
    Cf: regex$1,
    P: P,
    S: regex,
    Z: Z
  });
  // Generated using scripts/write-decode-map.ts
    var htmlDecodeTree = new Uint16Array(
  // prettier-ignore
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=> c.charCodeAt(0))));
  // Generated using scripts/write-decode-map.ts
    var xmlDecodeTree = new Uint16Array(
  // prettier-ignore
  "\u0200aglq\t\x15\x18\x1b\u026d\x0f\0\0\x12p;\u4026os;\u4027t;\u403et;\u403cuot;\u4022".split("").map((c => c.charCodeAt(0))));
  // Adapted from https://github.com/mathiasbynens/he/blob/36afe179392226cf1b6ccdb16ebbb7a5a844d93a/src/he.js#L106-L134
    var _a;
  const decodeMap = new Map([ [ 0, 65533 ], 
  // C1 Unicode control character reference replacements
  [ 128, 8364 ], [ 130, 8218 ], [ 131, 402 ], [ 132, 8222 ], [ 133, 8230 ], [ 134, 8224 ], [ 135, 8225 ], [ 136, 710 ], [ 137, 8240 ], [ 138, 352 ], [ 139, 8249 ], [ 140, 338 ], [ 142, 381 ], [ 145, 8216 ], [ 146, 8217 ], [ 147, 8220 ], [ 148, 8221 ], [ 149, 8226 ], [ 150, 8211 ], [ 151, 8212 ], [ 152, 732 ], [ 153, 8482 ], [ 154, 353 ], [ 155, 8250 ], [ 156, 339 ], [ 158, 382 ], [ 159, 376 ] ]);
  /**
   * Polyfill for `String.fromCodePoint`. It is used to create a string from a Unicode code point.
   */  const fromCodePoint$1 = 
  // eslint-disable-next-line @typescript-eslint/no-unnecessary-condition, node/no-unsupported-features/es-builtins
  (_a = String.fromCodePoint) !== null && _a !== void 0 ? _a : function(codePoint) {
    let output = "";
    if (codePoint > 65535) {
      codePoint -= 65536;
      output += String.fromCharCode(codePoint >>> 10 & 1023 | 55296);
      codePoint = 56320 | codePoint & 1023;
    }
    output += String.fromCharCode(codePoint);
    return output;
  };
  /**
   * Replace the given code point with a replacement character if it is a
   * surrogate or is outside the valid range. Otherwise return the code
   * point unchanged.
   */  function replaceCodePoint(codePoint) {
    var _a;
    if (codePoint >= 55296 && codePoint <= 57343 || codePoint > 1114111) {
      return 65533;
    }
    return (_a = decodeMap.get(codePoint)) !== null && _a !== void 0 ? _a : codePoint;
  }
  var CharCodes;
  (function(CharCodes) {
    CharCodes[CharCodes["NUM"] = 35] = "NUM";
    CharCodes[CharCodes["SEMI"] = 59] = "SEMI";
    CharCodes[CharCodes["EQUALS"] = 61] = "EQUALS";
    CharCodes[CharCodes["ZERO"] = 48] = "ZERO";
    CharCodes[CharCodes["NINE"] = 57] = "NINE";
    CharCodes[CharCodes["LOWER_A"] = 97] = "LOWER_A";
    CharCodes[CharCodes["LOWER_F"] = 102] = "LOWER_F";
    CharCodes[CharCodes["LOWER_X"] = 120] = "LOWER_X";
    CharCodes[CharCodes["LOWER_Z"] = 122] = "LOWER_Z";
    CharCodes[CharCodes["UPPER_A"] = 65] = "UPPER_A";
    CharCodes[CharCodes["UPPER_F"] = 70] = "UPPER_F";
    CharCodes[CharCodes["UPPER_Z"] = 90] = "UPPER_Z";
  })(CharCodes || (CharCodes = {}));
  /** Bit that needs to be set to convert an upper case ASCII character to lower case */  const TO_LOWER_BIT = 32;
  var BinTrieFlags;
  (function(BinTrieFlags) {
    BinTrieFlags[BinTrieFlags["VALUE_LENGTH"] = 49152] = "VALUE_LENGTH";
    BinTrieFlags[BinTrieFlags["BRANCH_LENGTH"] = 16256] = "BRANCH_LENGTH";
    BinTrieFlags[BinTrieFlags["JUMP_TABLE"] = 127] = "JUMP_TABLE";
  })(BinTrieFlags || (BinTrieFlags = {}));
  function isNumber(code) {
    return code >= CharCodes.ZERO && code <= CharCodes.NINE;
  }
  function isHexadecimalCharacter(code) {
    return code >= CharCodes.UPPER_A && code <= CharCodes.UPPER_F || code >= CharCodes.LOWER_A && code <= CharCodes.LOWER_F;
  }
  function isAsciiAlphaNumeric(code) {
    return code >= CharCodes.UPPER_A && code <= CharCodes.UPPER_Z || code >= CharCodes.LOWER_A && code <= CharCodes.LOWER_Z || isNumber(code);
  }
  /**
   * Checks if the given character is a valid end character for an entity in an attribute.
   *
   * Attribute values that aren't terminated properly aren't parsed, and shouldn't lead to a parser error.
   * See the example in https://html.spec.whatwg.org/multipage/parsing.html#named-character-reference-state
   */  function isEntityInAttributeInvalidEnd(code) {
    return code === CharCodes.EQUALS || isAsciiAlphaNumeric(code);
  }
  var EntityDecoderState;
  (function(EntityDecoderState) {
    EntityDecoderState[EntityDecoderState["EntityStart"] = 0] = "EntityStart";
    EntityDecoderState[EntityDecoderState["NumericStart"] = 1] = "NumericStart";
    EntityDecoderState[EntityDecoderState["NumericDecimal"] = 2] = "NumericDecimal";
    EntityDecoderState[EntityDecoderState["NumericHex"] = 3] = "NumericHex";
    EntityDecoderState[EntityDecoderState["NamedEntity"] = 4] = "NamedEntity";
  })(EntityDecoderState || (EntityDecoderState = {}));
  var DecodingMode;
  (function(DecodingMode) {
    /** Entities in text nodes that can end with any character. */
    DecodingMode[DecodingMode["Legacy"] = 0] = "Legacy";
    /** Only allow entities terminated with a semicolon. */    DecodingMode[DecodingMode["Strict"] = 1] = "Strict";
    /** Entities in attributes have limitations on ending characters. */    DecodingMode[DecodingMode["Attribute"] = 2] = "Attribute";
  })(DecodingMode || (DecodingMode = {}));
  /**
   * Token decoder with support of writing partial entities.
   */  class EntityDecoder {
    constructor(/** The tree used to decode entities. */
    decodeTree, 
    /**
     * The function that is called when a codepoint is decoded.
     *
     * For multi-byte named entities, this will be called multiple times,
     * with the second codepoint, and the same `consumed` value.
     *
     * @param codepoint The decoded codepoint.
     * @param consumed The number of bytes consumed by the decoder.
     */
    emitCodePoint, /** An object that is used to produce errors. */
    errors) {
      this.decodeTree = decodeTree;
      this.emitCodePoint = emitCodePoint;
      this.errors = errors;
      /** The current state of the decoder. */      this.state = EntityDecoderState.EntityStart;
      /** Characters that were consumed while parsing an entity. */      this.consumed = 1;
      /**
       * The result of the entity.
       *
       * Either the result index of a numeric entity, or the codepoint of a
       * numeric entity.
       */      this.result = 0;
      /** The current index in the decode tree. */      this.treeIndex = 0;
      /** The number of characters that were consumed in excess. */      this.excess = 1;
      /** The mode in which the decoder is operating. */      this.decodeMode = DecodingMode.Strict;
    }
    /** Resets the instance to make it reusable. */    startEntity(decodeMode) {
      this.decodeMode = decodeMode;
      this.state = EntityDecoderState.EntityStart;
      this.result = 0;
      this.treeIndex = 0;
      this.excess = 1;
      this.consumed = 1;
    }
    /**
     * Write an entity to the decoder. This can be called multiple times with partial entities.
     * If the entity is incomplete, the decoder will return -1.
     *
     * Mirrors the implementation of `getDecoder`, but with the ability to stop decoding if the
     * entity is incomplete, and resume when the next string is written.
     *
     * @param string The string containing the entity (or a continuation of the entity).
     * @param offset The offset at which the entity begins. Should be 0 if this is not the first call.
     * @returns The number of characters that were consumed, or -1 if the entity is incomplete.
     */    write(str, offset) {
      switch (this.state) {
       case EntityDecoderState.EntityStart:
        {
          if (str.charCodeAt(offset) === CharCodes.NUM) {
            this.state = EntityDecoderState.NumericStart;
            this.consumed += 1;
            return this.stateNumericStart(str, offset + 1);
          }
          this.state = EntityDecoderState.NamedEntity;
          return this.stateNamedEntity(str, offset);
        }

       case EntityDecoderState.NumericStart:
        {
          return this.stateNumericStart(str, offset);
        }

       case EntityDecoderState.NumericDecimal:
        {
          return this.stateNumericDecimal(str, offset);
        }

       case EntityDecoderState.NumericHex:
        {
          return this.stateNumericHex(str, offset);
        }

       case EntityDecoderState.NamedEntity:
        {
          return this.stateNamedEntity(str, offset);
        }
      }
    }
    /**
     * Switches between the numeric decimal and hexadecimal states.
     *
     * Equivalent to the `Numeric character reference state` in the HTML spec.
     *
     * @param str The string containing the entity (or a continuation of the entity).
     * @param offset The current offset.
     * @returns The number of characters that were consumed, or -1 if the entity is incomplete.
     */    stateNumericStart(str, offset) {
      if (offset >= str.length) {
        return -1;
      }
      if ((str.charCodeAt(offset) | TO_LOWER_BIT) === CharCodes.LOWER_X) {
        this.state = EntityDecoderState.NumericHex;
        this.consumed += 1;
        return this.stateNumericHex(str, offset + 1);
      }
      this.state = EntityDecoderState.NumericDecimal;
      return this.stateNumericDecimal(str, offset);
    }
    addToNumericResult(str, start, end, base) {
      if (start !== end) {
        const digitCount = end - start;
        this.result = this.result * Math.pow(base, digitCount) + parseInt(str.substr(start, digitCount), base);
        this.consumed += digitCount;
      }
    }
    /**
     * Parses a hexadecimal numeric entity.
     *
     * Equivalent to the `Hexademical character reference state` in the HTML spec.
     *
     * @param str The string containing the entity (or a continuation of the entity).
     * @param offset The current offset.
     * @returns The number of characters that were consumed, or -1 if the entity is incomplete.
     */    stateNumericHex(str, offset) {
      const startIdx = offset;
      while (offset < str.length) {
        const char = str.charCodeAt(offset);
        if (isNumber(char) || isHexadecimalCharacter(char)) {
          offset += 1;
        } else {
          this.addToNumericResult(str, startIdx, offset, 16);
          return this.emitNumericEntity(char, 3);
        }
      }
      this.addToNumericResult(str, startIdx, offset, 16);
      return -1;
    }
    /**
     * Parses a decimal numeric entity.
     *
     * Equivalent to the `Decimal character reference state` in the HTML spec.
     *
     * @param str The string containing the entity (or a continuation of the entity).
     * @param offset The current offset.
     * @returns The number of characters that were consumed, or -1 if the entity is incomplete.
     */    stateNumericDecimal(str, offset) {
      const startIdx = offset;
      while (offset < str.length) {
        const char = str.charCodeAt(offset);
        if (isNumber(char)) {
          offset += 1;
        } else {
          this.addToNumericResult(str, startIdx, offset, 10);
          return this.emitNumericEntity(char, 2);
        }
      }
      this.addToNumericResult(str, startIdx, offset, 10);
      return -1;
    }
    /**
     * Validate and emit a numeric entity.
     *
     * Implements the logic from the `Hexademical character reference start
     * state` and `Numeric character reference end state` in the HTML spec.
     *
     * @param lastCp The last code point of the entity. Used to see if the
     *               entity was terminated with a semicolon.
     * @param expectedLength The minimum number of characters that should be
     *                       consumed. Used to validate that at least one digit
     *                       was consumed.
     * @returns The number of characters that were consumed.
     */    emitNumericEntity(lastCp, expectedLength) {
      var _a;
      // Ensure we consumed at least one digit.
            if (this.consumed <= expectedLength) {
        (_a = this.errors) === null || _a === void 0 ? void 0 : _a.absenceOfDigitsInNumericCharacterReference(this.consumed);
        return 0;
      }
      // Figure out if this is a legit end of the entity
            if (lastCp === CharCodes.SEMI) {
        this.consumed += 1;
      } else if (this.decodeMode === DecodingMode.Strict) {
        return 0;
      }
      this.emitCodePoint(replaceCodePoint(this.result), this.consumed);
      if (this.errors) {
        if (lastCp !== CharCodes.SEMI) {
          this.errors.missingSemicolonAfterCharacterReference();
        }
        this.errors.validateNumericCharacterReference(this.result);
      }
      return this.consumed;
    }
    /**
     * Parses a named entity.
     *
     * Equivalent to the `Named character reference state` in the HTML spec.
     *
     * @param str The string containing the entity (or a continuation of the entity).
     * @param offset The current offset.
     * @returns The number of characters that were consumed, or -1 if the entity is incomplete.
     */    stateNamedEntity(str, offset) {
      const {decodeTree: decodeTree} = this;
      let current = decodeTree[this.treeIndex];
      // The mask is the number of bytes of the value, including the current byte.
            let valueLength = (current & BinTrieFlags.VALUE_LENGTH) >> 14;
      for (;offset < str.length; offset++, this.excess++) {
        const char = str.charCodeAt(offset);
        this.treeIndex = determineBranch(decodeTree, current, this.treeIndex + Math.max(1, valueLength), char);
        if (this.treeIndex < 0) {
          return this.result === 0 || 
          // If we are parsing an attribute
          this.decodeMode === DecodingMode.Attribute && (
          // We shouldn't have consumed any characters after the entity,
          valueLength === 0 || 
          // And there should be no invalid characters.
          isEntityInAttributeInvalidEnd(char)) ? 0 : this.emitNotTerminatedNamedEntity();
        }
        current = decodeTree[this.treeIndex];
        valueLength = (current & BinTrieFlags.VALUE_LENGTH) >> 14;
        // If the branch is a value, store it and continue
                if (valueLength !== 0) {
          // If the entity is terminated by a semicolon, we are done.
          if (char === CharCodes.SEMI) {
            return this.emitNamedEntityData(this.treeIndex, valueLength, this.consumed + this.excess);
          }
          // If we encounter a non-terminated (legacy) entity while parsing strictly, then ignore it.
                    if (this.decodeMode !== DecodingMode.Strict) {
            this.result = this.treeIndex;
            this.consumed += this.excess;
            this.excess = 0;
          }
        }
      }
      return -1;
    }
    /**
     * Emit a named entity that was not terminated with a semicolon.
     *
     * @returns The number of characters consumed.
     */    emitNotTerminatedNamedEntity() {
      var _a;
      const {result: result, decodeTree: decodeTree} = this;
      const valueLength = (decodeTree[result] & BinTrieFlags.VALUE_LENGTH) >> 14;
      this.emitNamedEntityData(result, valueLength, this.consumed);
      (_a = this.errors) === null || _a === void 0 ? void 0 : _a.missingSemicolonAfterCharacterReference();
      return this.consumed;
    }
    /**
     * Emit a named entity.
     *
     * @param result The index of the entity in the decode tree.
     * @param valueLength The number of bytes in the entity.
     * @param consumed The number of characters consumed.
     *
     * @returns The number of characters consumed.
     */    emitNamedEntityData(result, valueLength, consumed) {
      const {decodeTree: decodeTree} = this;
      this.emitCodePoint(valueLength === 1 ? decodeTree[result] & ~BinTrieFlags.VALUE_LENGTH : decodeTree[result + 1], consumed);
      if (valueLength === 3) {
        // For multi-byte values, we need to emit the second byte.
        this.emitCodePoint(decodeTree[result + 2], consumed);
      }
      return consumed;
    }
    /**
     * Signal to the parser that the end of the input was reached.
     *
     * Remaining data will be emitted and relevant errors will be produced.
     *
     * @returns The number of characters consumed.
     */    end() {
      var _a;
      switch (this.state) {
       case EntityDecoderState.NamedEntity:
        {
          // Emit a named entity if we have one.
          return this.result !== 0 && (this.decodeMode !== DecodingMode.Attribute || this.result === this.treeIndex) ? this.emitNotTerminatedNamedEntity() : 0;
        }

        // Otherwise, emit a numeric entity if we have one.
               case EntityDecoderState.NumericDecimal:
        {
          return this.emitNumericEntity(0, 2);
        }

       case EntityDecoderState.NumericHex:
        {
          return this.emitNumericEntity(0, 3);
        }

       case EntityDecoderState.NumericStart:
        {
          (_a = this.errors) === null || _a === void 0 ? void 0 : _a.absenceOfDigitsInNumericCharacterReference(this.consumed);
          return 0;
        }

       case EntityDecoderState.EntityStart:
        {
          // Return 0 if we have no entity.
          return 0;
        }
      }
    }
  }
  /**
   * Creates a function that decodes entities in a string.
   *
   * @param decodeTree The decode tree.
   * @returns A function that decodes entities in a string.
   */  function getDecoder(decodeTree) {
    let ret = "";
    const decoder = new EntityDecoder(decodeTree, (str => ret += fromCodePoint$1(str)));
    return function decodeWithTrie(str, decodeMode) {
      let lastIndex = 0;
      let offset = 0;
      while ((offset = str.indexOf("&", offset)) >= 0) {
        ret += str.slice(lastIndex, offset);
        decoder.startEntity(decodeMode);
        const len = decoder.write(str, 
        // Skip the "&"
        offset + 1);
        if (len < 0) {
          lastIndex = offset + decoder.end();
          break;
        }
        lastIndex = offset + len;
        // If `len` is 0, skip the current `&` and continue.
                offset = len === 0 ? lastIndex + 1 : lastIndex;
      }
      const result = ret + str.slice(lastIndex);
      // Make sure we don't keep a reference to the final string.
            ret = "";
      return result;
    };
  }
  /**
   * Determines the branch of the current node that is taken given the current
   * character. This function is used to traverse the trie.
   *
   * @param decodeTree The trie.
   * @param current The current node.
   * @param nodeIdx The index right after the current node and its value.
   * @param char The current character.
   * @returns The index of the next node, or -1 if no branch is taken.
   */  function determineBranch(decodeTree, current, nodeIdx, char) {
    const branchCount = (current & BinTrieFlags.BRANCH_LENGTH) >> 7;
    const jumpOffset = current & BinTrieFlags.JUMP_TABLE;
    // Case 1: Single branch encoded in jump offset
        if (branchCount === 0) {
      return jumpOffset !== 0 && char === jumpOffset ? nodeIdx : -1;
    }
    // Case 2: Multiple branches encoded in jump table
        if (jumpOffset) {
      const value = char - jumpOffset;
      return value < 0 || value >= branchCount ? -1 : decodeTree[nodeIdx + value] - 1;
    }
    // Case 3: Multiple branches encoded in dictionary
    // Binary search for the character.
        let lo = nodeIdx;
    let hi = lo + branchCount - 1;
    while (lo <= hi) {
      const mid = lo + hi >>> 1;
      const midVal = decodeTree[mid];
      if (midVal < char) {
        lo = mid + 1;
      } else if (midVal > char) {
        hi = mid - 1;
      } else {
        return decodeTree[mid + branchCount];
      }
    }
    return -1;
  }
  const htmlDecoder = getDecoder(htmlDecodeTree);
  getDecoder(xmlDecodeTree);
  /**
   * Decodes an HTML string.
   *
   * @param str The string to decode.
   * @param mode The decoding mode.
   * @returns The decoded string.
   */  function decodeHTML(str, mode = DecodingMode.Legacy) {
    return htmlDecoder(str, mode);
  }
  // Utilities
  
    function _class$1(obj) {
    return Object.prototype.toString.call(obj);
  }
  function isString$1(obj) {
    return _class$1(obj) === "[object String]";
  }
  const _hasOwnProperty = Object.prototype.hasOwnProperty;
  function has(object, key) {
    return _hasOwnProperty.call(object, key);
  }
  // Merge objects
  
    function assign$1(obj /* from1, from2, from3, ... */) {
    const sources = Array.prototype.slice.call(arguments, 1);
    sources.forEach((function(source) {
      if (!source) {
        return;
      }
      if (typeof source !== "object") {
        throw new TypeError(source + "must be object");
      }
      Object.keys(source).forEach((function(key) {
        obj[key] = source[key];
      }));
    }));
    return obj;
  }
  // Remove element from array and put another array at those position.
  // Useful for some operations with tokens
    function arrayReplaceAt(src, pos, newElements) {
    return [].concat(src.slice(0, pos), newElements, src.slice(pos + 1));
  }
  function isValidEntityCode(c) {
    /* eslint no-bitwise:0 */
    // broken sequence
    if (c >= 55296 && c <= 57343) {
      return false;
    }
    // never used
        if (c >= 64976 && c <= 65007) {
      return false;
    }
    if ((c & 65535) === 65535 || (c & 65535) === 65534) {
      return false;
    }
    // control codes
        if (c >= 0 && c <= 8) {
      return false;
    }
    if (c === 11) {
      return false;
    }
    if (c >= 14 && c <= 31) {
      return false;
    }
    if (c >= 127 && c <= 159) {
      return false;
    }
    // out of range
        if (c > 1114111) {
      return false;
    }
    return true;
  }
  function fromCodePoint(c) {
    /* eslint no-bitwise:0 */
    if (c > 65535) {
      c -= 65536;
      const surrogate1 = 55296 + (c >> 10);
      const surrogate2 = 56320 + (c & 1023);
      return String.fromCharCode(surrogate1, surrogate2);
    }
    return String.fromCharCode(c);
  }
  const UNESCAPE_MD_RE = /\\([!"#$%&'()*+,\-./:;<=>?@[\\\]^_`{|}~])/g;
  const ENTITY_RE = /&([a-z#][a-z0-9]{1,31});/gi;
  const UNESCAPE_ALL_RE = new RegExp(UNESCAPE_MD_RE.source + "|" + ENTITY_RE.source, "gi");
  const DIGITAL_ENTITY_TEST_RE = /^#((?:x[a-f0-9]{1,8}|[0-9]{1,8}))$/i;
  function replaceEntityPattern(match, name) {
    if (name.charCodeAt(0) === 35 /* # */ && DIGITAL_ENTITY_TEST_RE.test(name)) {
      const code = name[1].toLowerCase() === "x" ? parseInt(name.slice(2), 16) : parseInt(name.slice(1), 10);
      if (isValidEntityCode(code)) {
        return fromCodePoint(code);
      }
      return match;
    }
    const decoded = decodeHTML(match);
    if (decoded !== match) {
      return decoded;
    }
    return match;
  }
  /* function replaceEntities(str) {
    if (str.indexOf('&') < 0) { return str; }

    return str.replace(ENTITY_RE, replaceEntityPattern);
  } */  function unescapeMd(str) {
    if (str.indexOf("\\") < 0) {
      return str;
    }
    return str.replace(UNESCAPE_MD_RE, "$1");
  }
  function unescapeAll(str) {
    if (str.indexOf("\\") < 0 && str.indexOf("&") < 0) {
      return str;
    }
    return str.replace(UNESCAPE_ALL_RE, (function(match, escaped, entity) {
      if (escaped) {
        return escaped;
      }
      return replaceEntityPattern(match, entity);
    }));
  }
  const HTML_ESCAPE_TEST_RE = /[&<>"]/;
  const HTML_ESCAPE_REPLACE_RE = /[&<>"]/g;
  const HTML_REPLACEMENTS = {
    "&": "&amp;",
    "<": "&lt;",
    ">": "&gt;",
    '"': "&quot;"
  };
  function replaceUnsafeChar(ch) {
    return HTML_REPLACEMENTS[ch];
  }
  function escapeHtml(str) {
    if (HTML_ESCAPE_TEST_RE.test(str)) {
      return str.replace(HTML_ESCAPE_REPLACE_RE, replaceUnsafeChar);
    }
    return str;
  }
  const REGEXP_ESCAPE_RE = /[.?*+^$[\]\\(){}|-]/g;
  function escapeRE$1(str) {
    return str.replace(REGEXP_ESCAPE_RE, "\\$&");
  }
  function isSpace(code) {
    switch (code) {
     case 9:
     case 32:
      return true;
    }
    return false;
  }
  // Zs (unicode class) || [\t\f\v\r\n]
    function isWhiteSpace(code) {
    if (code >= 8192 && code <= 8202) {
      return true;
    }
    switch (code) {
     case 9:
 // \t
           case 10:
 // \n
           case 11:
 // \v
           case 12:
 // \f
           case 13:
 // \r
           case 32:
     case 160:
     case 5760:
     case 8239:
     case 8287:
     case 12288:
      return true;
    }
    return false;
  }
  /* eslint-disable max-len */
  // Currently without astral characters support.
    function isPunctChar(ch) {
    return P.test(ch) || regex.test(ch);
  }
  // Markdown ASCII punctuation characters.
  
  // !, ", #, $, %, &, ', (, ), *, +, ,, -, ., /, :, ;, <, =, >, ?, @, [, \, ], ^, _, `, {, |, }, or ~
  // http://spec.commonmark.org/0.15/#ascii-punctuation-character
  
  // Don't confuse with unicode punctuation !!! It lacks some chars in ascii range.
  
    function isMdAsciiPunct(ch) {
    switch (ch) {
     case 33 /* ! */ :
     case 34 /* " */ :
     case 35 /* # */ :
     case 36 /* $ */ :
     case 37 /* % */ :
     case 38 /* & */ :
     case 39 /* ' */ :
     case 40 /* ( */ :
     case 41 /* ) */ :
     case 42 /* * */ :
     case 43 /* + */ :
     case 44 /* , */ :
     case 45 /* - */ :
     case 46 /* . */ :
     case 47 /* / */ :
     case 58 /* : */ :
     case 59 /* ; */ :
     case 60 /* < */ :
     case 61 /* = */ :
     case 62 /* > */ :
     case 63 /* ? */ :
     case 64 /* @ */ :
     case 91 /* [ */ :
     case 92 /* \ */ :
     case 93 /* ] */ :
     case 94 /* ^ */ :
     case 95 /* _ */ :
     case 96 /* ` */ :
     case 123 /* { */ :
     case 124 /* | */ :
     case 125 /* } */ :
     case 126 /* ~ */ :
      return true;

     default:
      return false;
    }
  }
  // Hepler to unify [reference labels].
  
    function normalizeReference(str) {
    // Trim and collapse whitespace
    str = str.trim().replace(/\s+/g, " ");
    // In node v10 'ẞ'.toLowerCase() === 'Ṿ', which is presumed to be a bug
    // fixed in v12 (couldn't find any details).
    
    // So treat this one as a special case
    // (remove this when node v10 is no longer supported).
    
        if ("\u1e9e".toLowerCase() === "\u1e7e") {
      str = str.replace(/\u1e9e/g, "\xdf");
    }
    // .toLowerCase().toUpperCase() should get rid of all differences
    // between letter variants.
    
    // Simple .toLowerCase() doesn't normalize 125 code points correctly,
    // and .toUpperCase doesn't normalize 6 of them (list of exceptions:
    // İ, ϴ, ẞ, Ω, K, Å - those are already uppercased, but have differently
    // uppercased versions).
    
    // Here's an example showing how it happens. Lets take greek letter omega:
    // uppercase U+0398 (Θ), U+03f4 (ϴ) and lowercase U+03b8 (θ), U+03d1 (ϑ)
    
    // Unicode entries:
    // 0398;GREEK CAPITAL LETTER THETA;Lu;0;L;;;;;N;;;;03B8;
    // 03B8;GREEK SMALL LETTER THETA;Ll;0;L;;;;;N;;;0398;;0398
    // 03D1;GREEK THETA SYMBOL;Ll;0;L;<compat> 03B8;;;;N;GREEK SMALL LETTER SCRIPT THETA;;0398;;0398
    // 03F4;GREEK CAPITAL THETA SYMBOL;Lu;0;L;<compat> 0398;;;;N;;;;03B8;
    
    // Case-insensitive comparison should treat all of them as equivalent.
    
    // But .toLowerCase() doesn't change ϑ (it's already lowercase),
    // and .toUpperCase() doesn't change ϴ (already uppercase).
    
    // Applying first lower then upper case normalizes any character:
    // '\u0398\u03f4\u03b8\u03d1'.toLowerCase().toUpperCase() === '\u0398\u0398\u0398\u0398'
    
    // Note: this is equivalent to unicode case folding; unicode normalization
    // is a different step that is not required here.
    
    // Final result should be uppercased, because it's later stored in an object
    // (this avoid a conflict with Object.prototype members,
    // most notably, `__proto__`)
    
        return str.toLowerCase().toUpperCase();
  }
  // Re-export libraries commonly used in both markdown-it and its plugins,
  // so plugins won't have to depend on them explicitly, which reduces their
  // bundled size (e.g. a browser build).
  
    const lib = {
    mdurl: mdurl,
    ucmicro: ucmicro
  };
  var utils =  Object.freeze({
    __proto__: null,
    arrayReplaceAt: arrayReplaceAt,
    assign: assign$1,
    escapeHtml: escapeHtml,
    escapeRE: escapeRE$1,
    fromCodePoint: fromCodePoint,
    has: has,
    isMdAsciiPunct: isMdAsciiPunct,
    isPunctChar: isPunctChar,
    isSpace: isSpace,
    isString: isString$1,
    isValidEntityCode: isValidEntityCode,
    isWhiteSpace: isWhiteSpace,
    lib: lib,
    normalizeReference: normalizeReference,
    unescapeAll: unescapeAll,
    unescapeMd: unescapeMd
  });
  // Parse link label
  
  // this function assumes that first character ("[") already matches;
  // returns the end of the label
  
    function parseLinkLabel(state, start, disableNested) {
    let level, found, marker, prevPos;
    const max = state.posMax;
    const oldPos = state.pos;
    state.pos = start + 1;
    level = 1;
    while (state.pos < max) {
      marker = state.src.charCodeAt(state.pos);
      if (marker === 93 /* ] */) {
        level--;
        if (level === 0) {
          found = true;
          break;
        }
      }
      prevPos = state.pos;
      state.md.inline.skipToken(state);
      if (marker === 91 /* [ */) {
        if (prevPos === state.pos - 1) {
          // increase level if we find text `[`, which is not a part of any token
          level++;
        } else if (disableNested) {
          state.pos = oldPos;
          return -1;
        }
      }
    }
    let labelEnd = -1;
    if (found) {
      labelEnd = state.pos;
    }
    // restore old state
        state.pos = oldPos;
    return labelEnd;
  }
  // Parse link destination
  
    function parseLinkDestination(str, start, max) {
    let code;
    let pos = start;
    const result = {
      ok: false,
      pos: 0,
      str: ""
    };
    if (str.charCodeAt(pos) === 60 /* < */) {
      pos++;
      while (pos < max) {
        code = str.charCodeAt(pos);
        if (code === 10 /* \n */) {
          return result;
        }
        if (code === 60 /* < */) {
          return result;
        }
        if (code === 62 /* > */) {
          result.pos = pos + 1;
          result.str = unescapeAll(str.slice(start + 1, pos));
          result.ok = true;
          return result;
        }
        if (code === 92 /* \ */ && pos + 1 < max) {
          pos += 2;
          continue;
        }
        pos++;
      }
      // no closing '>'
            return result;
    }
    // this should be ... } else { ... branch
        let level = 0;
    while (pos < max) {
      code = str.charCodeAt(pos);
      if (code === 32) {
        break;
      }
      // ascii control characters
            if (code < 32 || code === 127) {
        break;
      }
      if (code === 92 /* \ */ && pos + 1 < max) {
        if (str.charCodeAt(pos + 1) === 32) {
          break;
        }
        pos += 2;
        continue;
      }
      if (code === 40 /* ( */) {
        level++;
        if (level > 32) {
          return result;
        }
      }
      if (code === 41 /* ) */) {
        if (level === 0) {
          break;
        }
        level--;
      }
      pos++;
    }
    if (start === pos) {
      return result;
    }
    if (level !== 0) {
      return result;
    }
    result.str = unescapeAll(str.slice(start, pos));
    result.pos = pos;
    result.ok = true;
    return result;
  }
  // Parse link title
  
  // Parse link title within `str` in [start, max] range,
  // or continue previous parsing if `prev_state` is defined (equal to result of last execution).
  
    function parseLinkTitle(str, start, max, prev_state) {
    let code;
    let pos = start;
    const state = {
      // if `true`, this is a valid link title
      ok: false,
      // if `true`, this link can be continued on the next line
      can_continue: false,
      // if `ok`, it's the position of the first character after the closing marker
      pos: 0,
      // if `ok`, it's the unescaped title
      str: "",
      // expected closing marker character code
      marker: 0
    };
    if (prev_state) {
      // this is a continuation of a previous parseLinkTitle call on the next line,
      // used in reference links only
      state.str = prev_state.str;
      state.marker = prev_state.marker;
    } else {
      if (pos >= max) {
        return state;
      }
      let marker = str.charCodeAt(pos);
      if (marker !== 34 /* " */ && marker !== 39 /* ' */ && marker !== 40 /* ( */) {
        return state;
      }
      start++;
      pos++;
      // if opening marker is "(", switch it to closing marker ")"
            if (marker === 40) {
        marker = 41;
      }
      state.marker = marker;
    }
    while (pos < max) {
      code = str.charCodeAt(pos);
      if (code === state.marker) {
        state.pos = pos + 1;
        state.str += unescapeAll(str.slice(start, pos));
        state.ok = true;
        return state;
      } else if (code === 40 /* ( */ && state.marker === 41 /* ) */) {
        return state;
      } else if (code === 92 /* \ */ && pos + 1 < max) {
        pos++;
      }
      pos++;
    }
    // no closing marker found, but this link title may continue on the next line (for references)
        state.can_continue = true;
    state.str += unescapeAll(str.slice(start, pos));
    return state;
  }
  // Just a shortcut for bulk export
    var helpers =  Object.freeze({
    __proto__: null,
    parseLinkDestination: parseLinkDestination,
    parseLinkLabel: parseLinkLabel,
    parseLinkTitle: parseLinkTitle
  });
  /**
   * class Renderer
   *
   * Generates HTML from parsed token stream. Each instance has independent
   * copy of rules. Those can be rewritten with ease. Also, you can add new
   * rules if you create plugin and adds new token types.
   **/  const default_rules = {};
  default_rules.code_inline = function(tokens, idx, options, env, slf) {
    const token = tokens[idx];
    return "<code" + slf.renderAttrs(token) + ">" + escapeHtml(token.content) + "</code>";
  };
  default_rules.code_block = function(tokens, idx, options, env, slf) {
    const token = tokens[idx];
    return "<pre" + slf.renderAttrs(token) + "><code>" + escapeHtml(tokens[idx].content) + "</code></pre>\n";
  };
  default_rules.fence = function(tokens, idx, options, env, slf) {
    const token = tokens[idx];
    const info = token.info ? unescapeAll(token.info).trim() : "";
    let langName = "";
    let langAttrs = "";
    if (info) {
      const arr = info.split(/(\s+)/g);
      langName = arr[0];
      langAttrs = arr.slice(2).join("");
    }
    let highlighted;
    if (options.highlight) {
      highlighted = options.highlight(token.content, langName, langAttrs) || escapeHtml(token.content);
    } else {
      highlighted = escapeHtml(token.content);
    }
    if (highlighted.indexOf("<pre") === 0) {
      return highlighted + "\n";
    }
    // If language exists, inject class gently, without modifying original token.
    // May be, one day we will add .deepClone() for token and simplify this part, but
    // now we prefer to keep things local.
        if (info) {
      const i = token.attrIndex("class");
      const tmpAttrs = token.attrs ? token.attrs.slice() : [];
      if (i < 0) {
        tmpAttrs.push([ "class", options.langPrefix + langName ]);
      } else {
        tmpAttrs[i] = tmpAttrs[i].slice();
        tmpAttrs[i][1] += " " + options.langPrefix + langName;
      }
      // Fake token just to render attributes
            const tmpToken = {
        attrs: tmpAttrs
      };
      return `<pre><code${slf.renderAttrs(tmpToken)}>${highlighted}</code></pre>\n`;
    }
    return `<pre><code${slf.renderAttrs(token)}>${highlighted}</code></pre>\n`;
  };
  default_rules.image = function(tokens, idx, options, env, slf) {
    const token = tokens[idx];
    // "alt" attr MUST be set, even if empty. Because it's mandatory and
    // should be placed on proper position for tests.
    
    // Replace content with actual value
        token.attrs[token.attrIndex("alt")][1] = slf.renderInlineAsText(token.children, options, env);
    return slf.renderToken(tokens, idx, options);
  };
  default_rules.hardbreak = function(tokens, idx, options /*, env */) {
    return options.xhtmlOut ? "<br />\n" : "<br>\n";
  };
  default_rules.softbreak = function(tokens, idx, options /*, env */) {
    return options.breaks ? options.xhtmlOut ? "<br />\n" : "<br>\n" : "\n";
  };
  default_rules.text = function(tokens, idx /*, options, env */) {
    return escapeHtml(tokens[idx].content);
  };
  default_rules.html_block = function(tokens, idx /*, options, env */) {
    return tokens[idx].content;
  };
  default_rules.html_inline = function(tokens, idx /*, options, env */) {
    return tokens[idx].content;
  };
  /**
   * new Renderer()
   *
   * Creates new [[Renderer]] instance and fill [[Renderer#rules]] with defaults.
   **/  function Renderer() {
    /**
     * Renderer#rules -> Object
     *
     * Contains render rules for tokens. Can be updated and extended.
     *
     * ##### Example
     *
     * ```javascript
     * var md = require('markdown-it')();
     *
     * md.renderer.rules.strong_open  = function () { return '<b>'; };
     * md.renderer.rules.strong_close = function () { return '</b>'; };
     *
     * var result = md.renderInline(...);
     * ```
     *
     * Each rule is called as independent static function with fixed signature:
     *
     * ```javascript
     * function my_token_render(tokens, idx, options, env, renderer) {
     *   // ...
     *   return renderedHTML;
     * }
     * ```
     *
     * See [source code](https://github.com/markdown-it/markdown-it/blob/master/lib/renderer.mjs)
     * for more details and examples.
     **/
    this.rules = assign$1({}, default_rules);
  }
  /**
   * Renderer.renderAttrs(token) -> String
   *
   * Render token attributes to string.
   **/  Renderer.prototype.renderAttrs = function renderAttrs(token) {
    let i, l, result;
    if (!token.attrs) {
      return "";
    }
    result = "";
    for (i = 0, l = token.attrs.length; i < l; i++) {
      result += " " + escapeHtml(token.attrs[i][0]) + '="' + escapeHtml(token.attrs[i][1]) + '"';
    }
    return result;
  };
  /**
   * Renderer.renderToken(tokens, idx, options) -> String
   * - tokens (Array): list of tokens
   * - idx (Numbed): token index to render
   * - options (Object): params of parser instance
   *
   * Default token renderer. Can be overriden by custom function
   * in [[Renderer#rules]].
   **/  Renderer.prototype.renderToken = function renderToken(tokens, idx, options) {
    const token = tokens[idx];
    let result = "";
    // Tight list paragraphs
        if (token.hidden) {
      return "";
    }
    // Insert a newline between hidden paragraph and subsequent opening
    // block-level tag.
    
    // For example, here we should insert a newline before blockquote:
    //  - a
    //    >
    
        if (token.block && token.nesting !== -1 && idx && tokens[idx - 1].hidden) {
      result += "\n";
    }
    // Add token name, e.g. `<img`
        result += (token.nesting === -1 ? "</" : "<") + token.tag;
    // Encode attributes, e.g. `<img src="foo"`
        result += this.renderAttrs(token);
    // Add a slash for self-closing tags, e.g. `<img src="foo" /`
        if (token.nesting === 0 && options.xhtmlOut) {
      result += " /";
    }
    // Check if we need to add a newline after this tag
        let needLf = false;
    if (token.block) {
      needLf = true;
      if (token.nesting === 1) {
        if (idx + 1 < tokens.length) {
          const nextToken = tokens[idx + 1];
          if (nextToken.type === "inline" || nextToken.hidden) {
            // Block-level tag containing an inline tag.
            needLf = false;
          } else if (nextToken.nesting === -1 && nextToken.tag === token.tag) {
            // Opening tag + closing tag of the same type. E.g. `<li></li>`.
            needLf = false;
          }
        }
      }
    }
    result += needLf ? ">\n" : ">";
    return result;
  };
  /**
   * Renderer.renderInline(tokens, options, env) -> String
   * - tokens (Array): list on block tokens to render
   * - options (Object): params of parser instance
   * - env (Object): additional data from parsed input (references, for example)
   *
   * The same as [[Renderer.render]], but for single token of `inline` type.
   **/  Renderer.prototype.renderInline = function(tokens, options, env) {
    let result = "";
    const rules = this.rules;
    for (let i = 0, len = tokens.length; i < len; i++) {
      const type = tokens[i].type;
      if (typeof rules[type] !== "undefined") {
        result += rules[type](tokens, i, options, env, this);
      } else {
        result += this.renderToken(tokens, i, options);
      }
    }
    return result;
  };
  /** internal
   * Renderer.renderInlineAsText(tokens, options, env) -> String
   * - tokens (Array): list on block tokens to render
   * - options (Object): params of parser instance
   * - env (Object): additional data from parsed input (references, for example)
   *
   * Special kludge for image `alt` attributes to conform CommonMark spec.
   * Don't try to use it! Spec requires to show `alt` content with stripped markup,
   * instead of simple escaping.
   **/  Renderer.prototype.renderInlineAsText = function(tokens, options, env) {
    let result = "";
    for (let i = 0, len = tokens.length; i < len; i++) {
      switch (tokens[i].type) {
       case "text":
        result += tokens[i].content;
        break;

       case "image":
        result += this.renderInlineAsText(tokens[i].children, options, env);
        break;

       case "html_inline":
       case "html_block":
        result += tokens[i].content;
        break;

       case "softbreak":
       case "hardbreak":
        result += "\n";
        break;
        // all other tokens are skipped
            }
    }
    return result;
  };
  /**
   * Renderer.render(tokens, options, env) -> String
   * - tokens (Array): list on block tokens to render
   * - options (Object): params of parser instance
   * - env (Object): additional data from parsed input (references, for example)
   *
   * Takes token stream and generates HTML. Probably, you will never need to call
   * this method directly.
   **/  Renderer.prototype.render = function(tokens, options, env) {
    let result = "";
    const rules = this.rules;
    for (let i = 0, len = tokens.length; i < len; i++) {
      const type = tokens[i].type;
      if (type === "inline") {
        result += this.renderInline(tokens[i].children, options, env);
      } else if (typeof rules[type] !== "undefined") {
        result += rules[type](tokens, i, options, env, this);
      } else {
        result += this.renderToken(tokens, i, options, env);
      }
    }
    return result;
  };
  /**
   * class Ruler
   *
   * Helper class, used by [[MarkdownIt#core]], [[MarkdownIt#block]] and
   * [[MarkdownIt#inline]] to manage sequences of functions (rules):
   *
   * - keep rules in defined order
   * - assign the name to each rule
   * - enable/disable rules
   * - add/replace rules
   * - allow assign rules to additional named chains (in the same)
   * - cacheing lists of active rules
   *
   * You will not need use this class directly until write plugins. For simple
   * rules control use [[MarkdownIt.disable]], [[MarkdownIt.enable]] and
   * [[MarkdownIt.use]].
   **/
  /**
   * new Ruler()
   **/  function Ruler() {
    // List of added rules. Each element is:
    // {
    //   name: XXX,
    //   enabled: Boolean,
    //   fn: Function(),
    //   alt: [ name2, name3 ]
    // }
    this.__rules__ = [];
    // Cached rule chains.
    
    // First level - chain name, '' for default.
    // Second level - diginal anchor for fast filtering by charcodes.
    
        this.__cache__ = null;
  }
  // Helper methods, should not be used directly
  // Find rule index by name
  
    Ruler.prototype.__find__ = function(name) {
    for (let i = 0; i < this.__rules__.length; i++) {
      if (this.__rules__[i].name === name) {
        return i;
      }
    }
    return -1;
  };
  // Build rules lookup cache
  
    Ruler.prototype.__compile__ = function() {
    const self = this;
    const chains = [ "" ];
    // collect unique names
        self.__rules__.forEach((function(rule) {
      if (!rule.enabled) {
        return;
      }
      rule.alt.forEach((function(altName) {
        if (chains.indexOf(altName) < 0) {
          chains.push(altName);
        }
      }));
    }));
    self.__cache__ = {};
    chains.forEach((function(chain) {
      self.__cache__[chain] = [];
      self.__rules__.forEach((function(rule) {
        if (!rule.enabled) {
          return;
        }
        if (chain && rule.alt.indexOf(chain) < 0) {
          return;
        }
        self.__cache__[chain].push(rule.fn);
      }));
    }));
  };
  /**
   * Ruler.at(name, fn [, options])
   * - name (String): rule name to replace.
   * - fn (Function): new rule function.
   * - options (Object): new rule options (not mandatory).
   *
   * Replace rule by name with new function & options. Throws error if name not
   * found.
   *
   * ##### Options:
   *
   * - __alt__ - array with names of "alternate" chains.
   *
   * ##### Example
   *
   * Replace existing typographer replacement rule with new one:
   *
   * ```javascript
   * var md = require('markdown-it')();
   *
   * md.core.ruler.at('replacements', function replace(state) {
   *   //...
   * });
   * ```
   **/  Ruler.prototype.at = function(name, fn, options) {
    const index = this.__find__(name);
    const opt = options || {};
    if (index === -1) {
      throw new Error("Parser rule not found: " + name);
    }
    this.__rules__[index].fn = fn;
    this.__rules__[index].alt = opt.alt || [];
    this.__cache__ = null;
  };
  /**
   * Ruler.before(beforeName, ruleName, fn [, options])
   * - beforeName (String): new rule will be added before this one.
   * - ruleName (String): name of added rule.
   * - fn (Function): rule function.
   * - options (Object): rule options (not mandatory).
   *
   * Add new rule to chain before one with given name. See also
   * [[Ruler.after]], [[Ruler.push]].
   *
   * ##### Options:
   *
   * - __alt__ - array with names of "alternate" chains.
   *
   * ##### Example
   *
   * ```javascript
   * var md = require('markdown-it')();
   *
   * md.block.ruler.before('paragraph', 'my_rule', function replace(state) {
   *   //...
   * });
   * ```
   **/  Ruler.prototype.before = function(beforeName, ruleName, fn, options) {
    const index = this.__find__(beforeName);
    const opt = options || {};
    if (index === -1) {
      throw new Error("Parser rule not found: " + beforeName);
    }
    this.__rules__.splice(index, 0, {
      name: ruleName,
      enabled: true,
      fn: fn,
      alt: opt.alt || []
    });
    this.__cache__ = null;
  };
  /**
   * Ruler.after(afterName, ruleName, fn [, options])
   * - afterName (String): new rule will be added after this one.
   * - ruleName (String): name of added rule.
   * - fn (Function): rule function.
   * - options (Object): rule options (not mandatory).
   *
   * Add new rule to chain after one with given name. See also
   * [[Ruler.before]], [[Ruler.push]].
   *
   * ##### Options:
   *
   * - __alt__ - array with names of "alternate" chains.
   *
   * ##### Example
   *
   * ```javascript
   * var md = require('markdown-it')();
   *
   * md.inline.ruler.after('text', 'my_rule', function replace(state) {
   *   //...
   * });
   * ```
   **/  Ruler.prototype.after = function(afterName, ruleName, fn, options) {
    const index = this.__find__(afterName);
    const opt = options || {};
    if (index === -1) {
      throw new Error("Parser rule not found: " + afterName);
    }
    this.__rules__.splice(index + 1, 0, {
      name: ruleName,
      enabled: true,
      fn: fn,
      alt: opt.alt || []
    });
    this.__cache__ = null;
  };
  /**
   * Ruler.push(ruleName, fn [, options])
   * - ruleName (String): name of added rule.
   * - fn (Function): rule function.
   * - options (Object): rule options (not mandatory).
   *
   * Push new rule to the end of chain. See also
   * [[Ruler.before]], [[Ruler.after]].
   *
   * ##### Options:
   *
   * - __alt__ - array with names of "alternate" chains.
   *
   * ##### Example
   *
   * ```javascript
   * var md = require('markdown-it')();
   *
   * md.core.ruler.push('my_rule', function replace(state) {
   *   //...
   * });
   * ```
   **/  Ruler.prototype.push = function(ruleName, fn, options) {
    const opt = options || {};
    this.__rules__.push({
      name: ruleName,
      enabled: true,
      fn: fn,
      alt: opt.alt || []
    });
    this.__cache__ = null;
  };
  /**
   * Ruler.enable(list [, ignoreInvalid]) -> Array
   * - list (String|Array): list of rule names to enable.
   * - ignoreInvalid (Boolean): set `true` to ignore errors when rule not found.
   *
   * Enable rules with given names. If any rule name not found - throw Error.
   * Errors can be disabled by second param.
   *
   * Returns list of found rule names (if no exception happened).
   *
   * See also [[Ruler.disable]], [[Ruler.enableOnly]].
   **/  Ruler.prototype.enable = function(list, ignoreInvalid) {
    if (!Array.isArray(list)) {
      list = [ list ];
    }
    const result = [];
    // Search by name and enable
        list.forEach((function(name) {
      const idx = this.__find__(name);
      if (idx < 0) {
        if (ignoreInvalid) {
          return;
        }
        throw new Error("Rules manager: invalid rule name " + name);
      }
      this.__rules__[idx].enabled = true;
      result.push(name);
    }), this);
    this.__cache__ = null;
    return result;
  };
  /**
   * Ruler.enableOnly(list [, ignoreInvalid])
   * - list (String|Array): list of rule names to enable (whitelist).
   * - ignoreInvalid (Boolean): set `true` to ignore errors when rule not found.
   *
   * Enable rules with given names, and disable everything else. If any rule name
   * not found - throw Error. Errors can be disabled by second param.
   *
   * See also [[Ruler.disable]], [[Ruler.enable]].
   **/  Ruler.prototype.enableOnly = function(list, ignoreInvalid) {
    if (!Array.isArray(list)) {
      list = [ list ];
    }
    this.__rules__.forEach((function(rule) {
      rule.enabled = false;
    }));
    this.enable(list, ignoreInvalid);
  };
  /**
   * Ruler.disable(list [, ignoreInvalid]) -> Array
   * - list (String|Array): list of rule names to disable.
   * - ignoreInvalid (Boolean): set `true` to ignore errors when rule not found.
   *
   * Disable rules with given names. If any rule name not found - throw Error.
   * Errors can be disabled by second param.
   *
   * Returns list of found rule names (if no exception happened).
   *
   * See also [[Ruler.enable]], [[Ruler.enableOnly]].
   **/  Ruler.prototype.disable = function(list, ignoreInvalid) {
    if (!Array.isArray(list)) {
      list = [ list ];
    }
    const result = [];
    // Search by name and disable
        list.forEach((function(name) {
      const idx = this.__find__(name);
      if (idx < 0) {
        if (ignoreInvalid) {
          return;
        }
        throw new Error("Rules manager: invalid rule name " + name);
      }
      this.__rules__[idx].enabled = false;
      result.push(name);
    }), this);
    this.__cache__ = null;
    return result;
  };
  /**
   * Ruler.getRules(chainName) -> Array
   *
   * Return array of active functions (rules) for given chain name. It analyzes
   * rules configuration, compiles caches if not exists and returns result.
   *
   * Default chain name is `''` (empty string). It can't be skipped. That's
   * done intentionally, to keep signature monomorphic for high speed.
   **/  Ruler.prototype.getRules = function(chainName) {
    if (this.__cache__ === null) {
      this.__compile__();
    }
    // Chain can be empty, if rules disabled. But we still have to return Array.
        return this.__cache__[chainName] || [];
  };
  // Token class
  /**
   * class Token
   **/
  /**
   * new Token(type, tag, nesting)
   *
   * Create new token and fill passed properties.
   **/  function Token(type, tag, nesting) {
    /**
     * Token#type -> String
     *
     * Type of the token (string, e.g. "paragraph_open")
     **/
    this.type = type;
    /**
     * Token#tag -> String
     *
     * html tag name, e.g. "p"
     **/    this.tag = tag;
    /**
     * Token#attrs -> Array
     *
     * Html attributes. Format: `[ [ name1, value1 ], [ name2, value2 ] ]`
     **/    this.attrs = null;
    /**
     * Token#map -> Array
     *
     * Source map info. Format: `[ line_begin, line_end ]`
     **/    this.map = null;
    /**
     * Token#nesting -> Number
     *
     * Level change (number in {-1, 0, 1} set), where:
     *
     * -  `1` means the tag is opening
     * -  `0` means the tag is self-closing
     * - `-1` means the tag is closing
     **/    this.nesting = nesting;
    /**
     * Token#level -> Number
     *
     * nesting level, the same as `state.level`
     **/    this.level = 0;
    /**
     * Token#children -> Array
     *
     * An array of child nodes (inline and img tokens)
     **/    this.children = null;
    /**
     * Token#content -> String
     *
     * In a case of self-closing tag (code, html, fence, etc.),
     * it has contents of this tag.
     **/    this.content = "";
    /**
     * Token#markup -> String
     *
     * '*' or '_' for emphasis, fence string for fence, etc.
     **/    this.markup = "";
    /**
     * Token#info -> String
     *
     * Additional information:
     *
     * - Info string for "fence" tokens
     * - The value "auto" for autolink "link_open" and "link_close" tokens
     * - The string value of the item marker for ordered-list "list_item_open" tokens
     **/    this.info = "";
    /**
     * Token#meta -> Object
     *
     * A place for plugins to store an arbitrary data
     **/    this.meta = null;
    /**
     * Token#block -> Boolean
     *
     * True for block-level tokens, false for inline tokens.
     * Used in renderer to calculate line breaks
     **/    this.block = false;
    /**
     * Token#hidden -> Boolean
     *
     * If it's true, ignore this element when rendering. Used for tight lists
     * to hide paragraphs.
     **/    this.hidden = false;
  }
  /**
   * Token.attrIndex(name) -> Number
   *
   * Search attribute index by name.
   **/  Token.prototype.attrIndex = function attrIndex(name) {
    if (!this.attrs) {
      return -1;
    }
    const attrs = this.attrs;
    for (let i = 0, len = attrs.length; i < len; i++) {
      if (attrs[i][0] === name) {
        return i;
      }
    }
    return -1;
  };
  /**
   * Token.attrPush(attrData)
   *
   * Add `[ name, value ]` attribute to list. Init attrs if necessary
   **/  Token.prototype.attrPush = function attrPush(attrData) {
    if (this.attrs) {
      this.attrs.push(attrData);
    } else {
      this.attrs = [ attrData ];
    }
  };
  /**
   * Token.attrSet(name, value)
   *
   * Set `name` attribute to `value`. Override old value if exists.
   **/  Token.prototype.attrSet = function attrSet(name, value) {
    const idx = this.attrIndex(name);
    const attrData = [ name, value ];
    if (idx < 0) {
      this.attrPush(attrData);
    } else {
      this.attrs[idx] = attrData;
    }
  };
  /**
   * Token.attrGet(name)
   *
   * Get the value of attribute `name`, or null if it does not exist.
   **/  Token.prototype.attrGet = function attrGet(name) {
    const idx = this.attrIndex(name);
    let value = null;
    if (idx >= 0) {
      value = this.attrs[idx][1];
    }
    return value;
  };
  /**
   * Token.attrJoin(name, value)
   *
   * Join value to existing attribute via space. Or create new attribute if not
   * exists. Useful to operate with token classes.
   **/  Token.prototype.attrJoin = function attrJoin(name, value) {
    const idx = this.attrIndex(name);
    if (idx < 0) {
      this.attrPush([ name, value ]);
    } else {
      this.attrs[idx][1] = this.attrs[idx][1] + " " + value;
    }
  };
  // Core state object
  
    function StateCore(src, md, env) {
    this.src = src;
    this.env = env;
    this.tokens = [];
    this.inlineMode = false;
    this.md = md;
 // link to parser instance
    }
  // re-export Token class to use in core rules
    StateCore.prototype.Token = Token;
  // Normalize input string
  // https://spec.commonmark.org/0.29/#line-ending
    const NEWLINES_RE = /\r\n?|\n/g;
  const NULL_RE = /\0/g;
  function normalize(state) {
    let str;
    // Normalize newlines
        str = state.src.replace(NEWLINES_RE, "\n");
    // Replace NULL characters
        str = str.replace(NULL_RE, "\ufffd");
    state.src = str;
  }
  function block(state) {
    let token;
    if (state.inlineMode) {
      token = new state.Token("inline", "", 0);
      token.content = state.src;
      token.map = [ 0, 1 ];
      token.children = [];
      state.tokens.push(token);
    } else {
      state.md.block.parse(state.src, state.md, state.env, state.tokens);
    }
  }
  function inline(state) {
    const tokens = state.tokens;
    // Parse inlines
        for (let i = 0, l = tokens.length; i < l; i++) {
      const tok = tokens[i];
      if (tok.type === "inline") {
        state.md.inline.parse(tok.content, state.md, state.env, tok.children);
      }
    }
  }
  // Replace link-like texts with link nodes.
  
  // Currently restricted by `md.validateLink()` to http/https/ftp
  
    function isLinkOpen$1(str) {
    return /^<a[>\s]/i.test(str);
  }
  function isLinkClose$1(str) {
    return /^<\/a\s*>/i.test(str);
  }
  function linkify$1(state) {
    const blockTokens = state.tokens;
    if (!state.md.options.linkify) {
      return;
    }
    for (let j = 0, l = blockTokens.length; j < l; j++) {
      if (blockTokens[j].type !== "inline" || !state.md.linkify.pretest(blockTokens[j].content)) {
        continue;
      }
      let tokens = blockTokens[j].children;
      let htmlLinkLevel = 0;
      // We scan from the end, to keep position when new tags added.
      // Use reversed logic in links start/end match
            for (let i = tokens.length - 1; i >= 0; i--) {
        const currentToken = tokens[i];
        // Skip content of markdown links
                if (currentToken.type === "link_close") {
          i--;
          while (tokens[i].level !== currentToken.level && tokens[i].type !== "link_open") {
            i--;
          }
          continue;
        }
        // Skip content of html tag links
                if (currentToken.type === "html_inline") {
          if (isLinkOpen$1(currentToken.content) && htmlLinkLevel > 0) {
            htmlLinkLevel--;
          }
          if (isLinkClose$1(currentToken.content)) {
            htmlLinkLevel++;
          }
        }
        if (htmlLinkLevel > 0) {
          continue;
        }
        if (currentToken.type === "text" && state.md.linkify.test(currentToken.content)) {
          const text = currentToken.content;
          let links = state.md.linkify.match(text);
          // Now split string to nodes
                    const nodes = [];
          let level = currentToken.level;
          let lastPos = 0;
          // forbid escape sequence at the start of the string,
          // this avoids http\://example.com/ from being linkified as
          // http:<a href="//example.com/">//example.com/</a>
                    if (links.length > 0 && links[0].index === 0 && i > 0 && tokens[i - 1].type === "text_special") {
            links = links.slice(1);
          }
          for (let ln = 0; ln < links.length; ln++) {
            const url = links[ln].url;
            const fullUrl = state.md.normalizeLink(url);
            if (!state.md.validateLink(fullUrl)) {
              continue;
            }
            let urlText = links[ln].text;
            // Linkifier might send raw hostnames like "example.com", where url
            // starts with domain name. So we prepend http:// in those cases,
            // and remove it afterwards.
            
                        if (!links[ln].schema) {
              urlText = state.md.normalizeLinkText("http://" + urlText).replace(/^http:\/\//, "");
            } else if (links[ln].schema === "mailto:" && !/^mailto:/i.test(urlText)) {
              urlText = state.md.normalizeLinkText("mailto:" + urlText).replace(/^mailto:/, "");
            } else {
              urlText = state.md.normalizeLinkText(urlText);
            }
            const pos = links[ln].index;
            if (pos > lastPos) {
              const token = new state.Token("text", "", 0);
              token.content = text.slice(lastPos, pos);
              token.level = level;
              nodes.push(token);
            }
            const token_o = new state.Token("link_open", "a", 1);
            token_o.attrs = [ [ "href", fullUrl ] ];
            token_o.level = level++;
            token_o.markup = "linkify";
            token_o.info = "auto";
            nodes.push(token_o);
            const token_t = new state.Token("text", "", 0);
            token_t.content = urlText;
            token_t.level = level;
            nodes.push(token_t);
            const token_c = new state.Token("link_close", "a", -1);
            token_c.level = --level;
            token_c.markup = "linkify";
            token_c.info = "auto";
            nodes.push(token_c);
            lastPos = links[ln].lastIndex;
          }
          if (lastPos < text.length) {
            const token = new state.Token("text", "", 0);
            token.content = text.slice(lastPos);
            token.level = level;
            nodes.push(token);
          }
          // replace current node
                    blockTokens[j].children = tokens = arrayReplaceAt(tokens, i, nodes);
        }
      }
    }
  }
  // Simple typographic replacements
  
  // (c) (C) → ©
  // (tm) (TM) → ™
  // (r) (R) → ®
  // +- → ±
  // ... → … (also ?.... → ?.., !.... → !..)
  // ???????? → ???, !!!!! → !!!, `,,` → `,`
  // -- → &ndash;, --- → &mdash;
  
  // TODO:
  // - fractionals 1/2, 1/4, 3/4 -> ½, ¼, ¾
  // - multiplications 2 x 4 -> 2 × 4
    const RARE_RE = /\+-|\.\.|\?\?\?\?|!!!!|,,|--/;
  // Workaround for phantomjs - need regex without /g flag,
  // or root check will fail every second time
    const SCOPED_ABBR_TEST_RE = /\((c|tm|r)\)/i;
  const SCOPED_ABBR_RE = /\((c|tm|r)\)/gi;
  const SCOPED_ABBR = {
    c: "\xa9",
    r: "\xae",
    tm: "\u2122"
  };
  function replaceFn(match, name) {
    return SCOPED_ABBR[name.toLowerCase()];
  }
  function replace_scoped(inlineTokens) {
    let inside_autolink = 0;
    for (let i = inlineTokens.length - 1; i >= 0; i--) {
      const token = inlineTokens[i];
      if (token.type === "text" && !inside_autolink) {
        token.content = token.content.replace(SCOPED_ABBR_RE, replaceFn);
      }
      if (token.type === "link_open" && token.info === "auto") {
        inside_autolink--;
      }
      if (token.type === "link_close" && token.info === "auto") {
        inside_autolink++;
      }
    }
  }
  function replace_rare(inlineTokens) {
    let inside_autolink = 0;
    for (let i = inlineTokens.length - 1; i >= 0; i--) {
      const token = inlineTokens[i];
      if (token.type === "text" && !inside_autolink) {
        if (RARE_RE.test(token.content)) {
          token.content = token.content.replace(/\+-/g, "\xb1").replace(/\.{2,}/g, "\u2026").replace(/([?!])\u2026/g, "$1..").replace(/([?!]){4,}/g, "$1$1$1").replace(/,{2,}/g, ",").replace(/(^|[^-])---(?=[^-]|$)/gm, "$1\u2014").replace(/(^|\s)--(?=\s|$)/gm, "$1\u2013").replace(/(^|[^-\s])--(?=[^-\s]|$)/gm, "$1\u2013");
        }
      }
      if (token.type === "link_open" && token.info === "auto") {
        inside_autolink--;
      }
      if (token.type === "link_close" && token.info === "auto") {
        inside_autolink++;
      }
    }
  }
  function replace(state) {
    let blkIdx;
    if (!state.md.options.typographer) {
      return;
    }
    for (blkIdx = state.tokens.length - 1; blkIdx >= 0; blkIdx--) {
      if (state.tokens[blkIdx].type !== "inline") {
        continue;
      }
      if (SCOPED_ABBR_TEST_RE.test(state.tokens[blkIdx].content)) {
        replace_scoped(state.tokens[blkIdx].children);
      }
      if (RARE_RE.test(state.tokens[blkIdx].content)) {
        replace_rare(state.tokens[blkIdx].children);
      }
    }
  }
  // Convert straight quotation marks to typographic ones
  
    const QUOTE_TEST_RE = /['"]/;
  const QUOTE_RE = /['"]/g;
  const APOSTROPHE = "\u2019";
 /* ’ */  function replaceAt(str, index, ch) {
    return str.slice(0, index) + ch + str.slice(index + 1);
  }
  function process_inlines(tokens, state) {
    let j;
    const stack = [];
    for (let i = 0; i < tokens.length; i++) {
      const token = tokens[i];
      const thisLevel = tokens[i].level;
      for (j = stack.length - 1; j >= 0; j--) {
        if (stack[j].level <= thisLevel) {
          break;
        }
      }
      stack.length = j + 1;
      if (token.type !== "text") {
        continue;
      }
      let text = token.content;
      let pos = 0;
      let max = text.length;
      /* eslint no-labels:0,block-scoped-var:0 */      OUTER: while (pos < max) {
        QUOTE_RE.lastIndex = pos;
        const t = QUOTE_RE.exec(text);
        if (!t) {
          break;
        }
        let canOpen = true;
        let canClose = true;
        pos = t.index + 1;
        const isSingle = t[0] === "'";
        // Find previous character,
        // default to space if it's the beginning of the line
        
                let lastChar = 32;
        if (t.index - 1 >= 0) {
          lastChar = text.charCodeAt(t.index - 1);
        } else {
          for (j = i - 1; j >= 0; j--) {
            if (tokens[j].type === "softbreak" || tokens[j].type === "hardbreak") break;
 // lastChar defaults to 0x20
                        if (!tokens[j].content) continue;
 // should skip all tokens except 'text', 'html_inline' or 'code_inline'
                        lastChar = tokens[j].content.charCodeAt(tokens[j].content.length - 1);
            break;
          }
        }
        // Find next character,
        // default to space if it's the end of the line
        
                let nextChar = 32;
        if (pos < max) {
          nextChar = text.charCodeAt(pos);
        } else {
          for (j = i + 1; j < tokens.length; j++) {
            if (tokens[j].type === "softbreak" || tokens[j].type === "hardbreak") break;
 // nextChar defaults to 0x20
                        if (!tokens[j].content) continue;
 // should skip all tokens except 'text', 'html_inline' or 'code_inline'
                        nextChar = tokens[j].content.charCodeAt(0);
            break;
          }
        }
        const isLastPunctChar = isMdAsciiPunct(lastChar) || isPunctChar(String.fromCharCode(lastChar));
        const isNextPunctChar = isMdAsciiPunct(nextChar) || isPunctChar(String.fromCharCode(nextChar));
        const isLastWhiteSpace = isWhiteSpace(lastChar);
        const isNextWhiteSpace = isWhiteSpace(nextChar);
        if (isNextWhiteSpace) {
          canOpen = false;
        } else if (isNextPunctChar) {
          if (!(isLastWhiteSpace || isLastPunctChar)) {
            canOpen = false;
          }
        }
        if (isLastWhiteSpace) {
          canClose = false;
        } else if (isLastPunctChar) {
          if (!(isNextWhiteSpace || isNextPunctChar)) {
            canClose = false;
          }
        }
        if (nextChar === 34 /* " */ && t[0] === '"') {
          if (lastChar >= 48 /* 0 */ && lastChar <= 57 /* 9 */) {
            // special case: 1"" - count first quote as an inch
            canClose = canOpen = false;
          }
        }
        if (canOpen && canClose) {
          // Replace quotes in the middle of punctuation sequence, but not
          // in the middle of the words, i.e.:
          // 1. foo " bar " baz - not replaced
          // 2. foo-"-bar-"-baz - replaced
          // 3. foo"bar"baz     - not replaced
          canOpen = isLastPunctChar;
          canClose = isNextPunctChar;
        }
        if (!canOpen && !canClose) {
          // middle of word
          if (isSingle) {
            token.content = replaceAt(token.content, t.index, APOSTROPHE);
          }
          continue;
        }
        if (canClose) {
          // this could be a closing quote, rewind the stack to get a match
          for (j = stack.length - 1; j >= 0; j--) {
            let item = stack[j];
            if (stack[j].level < thisLevel) {
              break;
            }
            if (item.single === isSingle && stack[j].level === thisLevel) {
              item = stack[j];
              let openQuote;
              let closeQuote;
              if (isSingle) {
                openQuote = state.md.options.quotes[2];
                closeQuote = state.md.options.quotes[3];
              } else {
                openQuote = state.md.options.quotes[0];
                closeQuote = state.md.options.quotes[1];
              }
              // replace token.content *before* tokens[item.token].content,
              // because, if they are pointing at the same token, replaceAt
              // could mess up indices when quote length != 1
                            token.content = replaceAt(token.content, t.index, closeQuote);
              tokens[item.token].content = replaceAt(tokens[item.token].content, item.pos, openQuote);
              pos += closeQuote.length - 1;
              if (item.token === i) {
                pos += openQuote.length - 1;
              }
              text = token.content;
              max = text.length;
              stack.length = j;
              continue OUTER;
            }
          }
        }
        if (canOpen) {
          stack.push({
            token: i,
            pos: t.index,
            single: isSingle,
            level: thisLevel
          });
        } else if (canClose && isSingle) {
          token.content = replaceAt(token.content, t.index, APOSTROPHE);
        }
      }
    }
  }
  function smartquotes(state) {
    /* eslint max-depth:0 */
    if (!state.md.options.typographer) {
      return;
    }
    for (let blkIdx = state.tokens.length - 1; blkIdx >= 0; blkIdx--) {
      if (state.tokens[blkIdx].type !== "inline" || !QUOTE_TEST_RE.test(state.tokens[blkIdx].content)) {
        continue;
      }
      process_inlines(state.tokens[blkIdx].children, state);
    }
  }
  // Join raw text tokens with the rest of the text
  
  // This is set as a separate rule to provide an opportunity for plugins
  // to run text replacements after text join, but before escape join.
  
  // For example, `\:)` shouldn't be replaced with an emoji.
  
    function text_join(state) {
    let curr, last;
    const blockTokens = state.tokens;
    const l = blockTokens.length;
    for (let j = 0; j < l; j++) {
      if (blockTokens[j].type !== "inline") continue;
      const tokens = blockTokens[j].children;
      const max = tokens.length;
      for (curr = 0; curr < max; curr++) {
        if (tokens[curr].type === "text_special") {
          tokens[curr].type = "text";
        }
      }
      for (curr = last = 0; curr < max; curr++) {
        if (tokens[curr].type === "text" && curr + 1 < max && tokens[curr + 1].type === "text") {
          // collapse two adjacent text nodes
          tokens[curr + 1].content = tokens[curr].content + tokens[curr + 1].content;
        } else {
          if (curr !== last) {
            tokens[last] = tokens[curr];
          }
          last++;
        }
      }
      if (curr !== last) {
        tokens.length = last;
      }
    }
  }
  /** internal
   * class Core
   *
   * Top-level rules executor. Glues block/inline parsers and does intermediate
   * transformations.
   **/  const _rules$2 = [ [ "normalize", normalize ], [ "block", block ], [ "inline", inline ], [ "linkify", linkify$1 ], [ "replacements", replace ], [ "smartquotes", smartquotes ], 
  // `text_join` finds `text_special` tokens (for escape sequences)
  // and joins them with the rest of the text
  [ "text_join", text_join ] ];
  /**
   * new Core()
   **/  function Core() {
    /**
     * Core#ruler -> Ruler
     *
     * [[Ruler]] instance. Keep configuration of core rules.
     **/
    this.ruler = new Ruler;
    for (let i = 0; i < _rules$2.length; i++) {
      this.ruler.push(_rules$2[i][0], _rules$2[i][1]);
    }
  }
  /**
   * Core.process(state)
   *
   * Executes core chain rules.
   **/  Core.prototype.process = function(state) {
    const rules = this.ruler.getRules("");
    for (let i = 0, l = rules.length; i < l; i++) {
      rules[i](state);
    }
  };
  Core.prototype.State = StateCore;
  // Parser state class
    function StateBlock(src, md, env, tokens) {
    this.src = src;
    // link to parser instance
        this.md = md;
    this.env = env;
    
    // Internal state vartiables
    
        this.tokens = tokens;
    this.bMarks = [];
 // line begin offsets for fast jumps
        this.eMarks = [];
 // line end offsets for fast jumps
        this.tShift = [];
 // offsets of the first non-space characters (tabs not expanded)
        this.sCount = [];
 // indents for each line (tabs expanded)
    // An amount of virtual spaces (tabs expanded) between beginning
    // of each line (bMarks) and real beginning of that line.
    
    // It exists only as a hack because blockquotes override bMarks
    // losing information in the process.
    
    // It's used only when expanding tabs, you can think about it as
    // an initial tab length, e.g. bsCount=21 applied to string `\t123`
    // means first tab should be expanded to 4-21%4 === 3 spaces.
    
        this.bsCount = [];
    // block parser variables
    // required block content indent (for example, if we are
    // inside a list, it would be positioned after list marker)
        this.blkIndent = 0;
    this.line = 0;
 // line index in src
        this.lineMax = 0;
 // lines count
        this.tight = false;
 // loose/tight mode for lists
        this.ddIndent = -1;
 // indent of the current dd block (-1 if there isn't any)
        this.listIndent = -1;
 // indent of the current list block (-1 if there isn't any)
    // can be 'blockquote', 'list', 'root', 'paragraph' or 'reference'
    // used in lists to determine if they interrupt a paragraph
        this.parentType = "root";
    this.level = 0;
    // Create caches
    // Generate markers.
        const s = this.src;
    for (let start = 0, pos = 0, indent = 0, offset = 0, len = s.length, indent_found = false; pos < len; pos++) {
      const ch = s.charCodeAt(pos);
      if (!indent_found) {
        if (isSpace(ch)) {
          indent++;
          if (ch === 9) {
            offset += 4 - offset % 4;
          } else {
            offset++;
          }
          continue;
        } else {
          indent_found = true;
        }
      }
      if (ch === 10 || pos === len - 1) {
        if (ch !== 10) {
          pos++;
        }
        this.bMarks.push(start);
        this.eMarks.push(pos);
        this.tShift.push(indent);
        this.sCount.push(offset);
        this.bsCount.push(0);
        indent_found = false;
        indent = 0;
        offset = 0;
        start = pos + 1;
      }
    }
    // Push fake entry to simplify cache bounds checks
        this.bMarks.push(s.length);
    this.eMarks.push(s.length);
    this.tShift.push(0);
    this.sCount.push(0);
    this.bsCount.push(0);
    this.lineMax = this.bMarks.length - 1;
 // don't count last fake line
    }
  // Push new token to "stream".
  
    StateBlock.prototype.push = function(type, tag, nesting) {
    const token = new Token(type, tag, nesting);
    token.block = true;
    if (nesting < 0) this.level--;
 // closing tag
        token.level = this.level;
    if (nesting > 0) this.level++;
 // opening tag
        this.tokens.push(token);
    return token;
  };
  StateBlock.prototype.isEmpty = function isEmpty(line) {
    return this.bMarks[line] + this.tShift[line] >= this.eMarks[line];
  };
  StateBlock.prototype.skipEmptyLines = function skipEmptyLines(from) {
    for (let max = this.lineMax; from < max; from++) {
      if (this.bMarks[from] + this.tShift[from] < this.eMarks[from]) {
        break;
      }
    }
    return from;
  };
  // Skip spaces from given position.
    StateBlock.prototype.skipSpaces = function skipSpaces(pos) {
    for (let max = this.src.length; pos < max; pos++) {
      const ch = this.src.charCodeAt(pos);
      if (!isSpace(ch)) {
        break;
      }
    }
    return pos;
  };
  // Skip spaces from given position in reverse.
    StateBlock.prototype.skipSpacesBack = function skipSpacesBack(pos, min) {
    if (pos <= min) {
      return pos;
    }
    while (pos > min) {
      if (!isSpace(this.src.charCodeAt(--pos))) {
        return pos + 1;
      }
    }
    return pos;
  };
  // Skip char codes from given position
    StateBlock.prototype.skipChars = function skipChars(pos, code) {
    for (let max = this.src.length; pos < max; pos++) {
      if (this.src.charCodeAt(pos) !== code) {
        break;
      }
    }
    return pos;
  };
  // Skip char codes reverse from given position - 1
    StateBlock.prototype.skipCharsBack = function skipCharsBack(pos, code, min) {
    if (pos <= min) {
      return pos;
    }
    while (pos > min) {
      if (code !== this.src.charCodeAt(--pos)) {
        return pos + 1;
      }
    }
    return pos;
  };
  // cut lines range from source.
    StateBlock.prototype.getLines = function getLines(begin, end, indent, keepLastLF) {
    if (begin >= end) {
      return "";
    }
    const queue = new Array(end - begin);
    for (let i = 0, line = begin; line < end; line++, i++) {
      let lineIndent = 0;
      const lineStart = this.bMarks[line];
      let first = lineStart;
      let last;
      if (line + 1 < end || keepLastLF) {
        // No need for bounds check because we have fake entry on tail.
        last = this.eMarks[line] + 1;
      } else {
        last = this.eMarks[line];
      }
      while (first < last && lineIndent < indent) {
        const ch = this.src.charCodeAt(first);
        if (isSpace(ch)) {
          if (ch === 9) {
            lineIndent += 4 - (lineIndent + this.bsCount[line]) % 4;
          } else {
            lineIndent++;
          }
        } else if (first - lineStart < this.tShift[line]) {
          // patched tShift masked characters to look like spaces (blockquotes, list markers)
          lineIndent++;
        } else {
          break;
        }
        first++;
      }
      if (lineIndent > indent) {
        // partially expanding tabs in code blocks, e.g '\t\tfoobar'
        // with indent=2 becomes '  \tfoobar'
        queue[i] = new Array(lineIndent - indent + 1).join(" ") + this.src.slice(first, last);
      } else {
        queue[i] = this.src.slice(first, last);
      }
    }
    return queue.join("");
  };
  // re-export Token class to use in block rules
    StateBlock.prototype.Token = Token;
  // GFM table, https://github.github.com/gfm/#tables-extension-
  // Limit the amount of empty autocompleted cells in a table,
  // see https://github.com/markdown-it/markdown-it/issues/1000,
  
  // Both pulldown-cmark and commonmark-hs limit the number of cells this way to ~200k.
  // We set it to 65k, which can expand user input by a factor of x370
  // (256x256 square is 1.8kB expanded into 650kB).
    const MAX_AUTOCOMPLETED_CELLS = 65536;
  function getLine(state, line) {
    const pos = state.bMarks[line] + state.tShift[line];
    const max = state.eMarks[line];
    return state.src.slice(pos, max);
  }
  function escapedSplit(str) {
    const result = [];
    const max = str.length;
    let pos = 0;
    let ch = str.charCodeAt(pos);
    let isEscaped = false;
    let lastPos = 0;
    let current = "";
    while (pos < max) {
      if (ch === 124 /* | */) {
        if (!isEscaped) {
          // pipe separating cells, '|'
          result.push(current + str.substring(lastPos, pos));
          current = "";
          lastPos = pos + 1;
        } else {
          // escaped pipe, '\|'
          current += str.substring(lastPos, pos - 1);
          lastPos = pos;
        }
      }
      isEscaped = ch === 92 /* \ */;
      pos++;
      ch = str.charCodeAt(pos);
    }
    result.push(current + str.substring(lastPos));
    return result;
  }
  function table(state, startLine, endLine, silent) {
    // should have at least two lines
    if (startLine + 2 > endLine) {
      return false;
    }
    let nextLine = startLine + 1;
    if (state.sCount[nextLine] < state.blkIndent) {
      return false;
    }
    // if it's indented more than 3 spaces, it should be a code block
        if (state.sCount[nextLine] - state.blkIndent >= 4) {
      return false;
    }
    // first character of the second line should be '|', '-', ':',
    // and no other characters are allowed but spaces;
    // basically, this is the equivalent of /^[-:|][-:|\s]*$/ regexp
        let pos = state.bMarks[nextLine] + state.tShift[nextLine];
    if (pos >= state.eMarks[nextLine]) {
      return false;
    }
    const firstCh = state.src.charCodeAt(pos++);
    if (firstCh !== 124 /* | */ && firstCh !== 45 /* - */ && firstCh !== 58 /* : */) {
      return false;
    }
    if (pos >= state.eMarks[nextLine]) {
      return false;
    }
    const secondCh = state.src.charCodeAt(pos++);
    if (secondCh !== 124 /* | */ && secondCh !== 45 /* - */ && secondCh !== 58 /* : */ && !isSpace(secondCh)) {
      return false;
    }
    // if first character is '-', then second character must not be a space
    // (due to parsing ambiguity with list)
        if (firstCh === 45 /* - */ && isSpace(secondCh)) {
      return false;
    }
    while (pos < state.eMarks[nextLine]) {
      const ch = state.src.charCodeAt(pos);
      if (ch !== 124 /* | */ && ch !== 45 /* - */ && ch !== 58 /* : */ && !isSpace(ch)) {
        return false;
      }
      pos++;
    }
    let lineText = getLine(state, startLine + 1);
    let columns = lineText.split("|");
    const aligns = [];
    for (let i = 0; i < columns.length; i++) {
      const t = columns[i].trim();
      if (!t) {
        // allow empty columns before and after table, but not in between columns;
        // e.g. allow ` |---| `, disallow ` ---||--- `
        if (i === 0 || i === columns.length - 1) {
          continue;
        } else {
          return false;
        }
      }
      if (!/^:?-+:?$/.test(t)) {
        return false;
      }
      if (t.charCodeAt(t.length - 1) === 58 /* : */) {
        aligns.push(t.charCodeAt(0) === 58 /* : */ ? "center" : "right");
      } else if (t.charCodeAt(0) === 58 /* : */) {
        aligns.push("left");
      } else {
        aligns.push("");
      }
    }
    lineText = getLine(state, startLine).trim();
    if (lineText.indexOf("|") === -1) {
      return false;
    }
    if (state.sCount[startLine] - state.blkIndent >= 4) {
      return false;
    }
    columns = escapedSplit(lineText);
    if (columns.length && columns[0] === "") columns.shift();
    if (columns.length && columns[columns.length - 1] === "") columns.pop();
    // header row will define an amount of columns in the entire table,
    // and align row should be exactly the same (the rest of the rows can differ)
        const columnCount = columns.length;
    if (columnCount === 0 || columnCount !== aligns.length) {
      return false;
    }
    if (silent) {
      return true;
    }
    const oldParentType = state.parentType;
    state.parentType = "table";
    // use 'blockquote' lists for termination because it's
    // the most similar to tables
        const terminatorRules = state.md.block.ruler.getRules("blockquote");
    const token_to = state.push("table_open", "table", 1);
    const tableLines = [ startLine, 0 ];
    token_to.map = tableLines;
    const token_tho = state.push("thead_open", "thead", 1);
    token_tho.map = [ startLine, startLine + 1 ];
    const token_htro = state.push("tr_open", "tr", 1);
    token_htro.map = [ startLine, startLine + 1 ];
    for (let i = 0; i < columns.length; i++) {
      const token_ho = state.push("th_open", "th", 1);
      if (aligns[i]) {
        token_ho.attrs = [ [ "style", "text-align:" + aligns[i] ] ];
      }
      const token_il = state.push("inline", "", 0);
      token_il.content = columns[i].trim();
      token_il.children = [];
      state.push("th_close", "th", -1);
    }
    state.push("tr_close", "tr", -1);
    state.push("thead_close", "thead", -1);
    let tbodyLines;
    let autocompletedCells = 0;
    for (nextLine = startLine + 2; nextLine < endLine; nextLine++) {
      if (state.sCount[nextLine] < state.blkIndent) {
        break;
      }
      let terminate = false;
      for (let i = 0, l = terminatorRules.length; i < l; i++) {
        if (terminatorRules[i](state, nextLine, endLine, true)) {
          terminate = true;
          break;
        }
      }
      if (terminate) {
        break;
      }
      lineText = getLine(state, nextLine).trim();
      if (!lineText) {
        break;
      }
      if (state.sCount[nextLine] - state.blkIndent >= 4) {
        break;
      }
      columns = escapedSplit(lineText);
      if (columns.length && columns[0] === "") columns.shift();
      if (columns.length && columns[columns.length - 1] === "") columns.pop();
      // note: autocomplete count can be negative if user specifies more columns than header,
      // but that does not affect intended use (which is limiting expansion)
            autocompletedCells += columnCount - columns.length;
      if (autocompletedCells > MAX_AUTOCOMPLETED_CELLS) {
        break;
      }
      if (nextLine === startLine + 2) {
        const token_tbo = state.push("tbody_open", "tbody", 1);
        token_tbo.map = tbodyLines = [ startLine + 2, 0 ];
      }
      const token_tro = state.push("tr_open", "tr", 1);
      token_tro.map = [ nextLine, nextLine + 1 ];
      for (let i = 0; i < columnCount; i++) {
        const token_tdo = state.push("td_open", "td", 1);
        if (aligns[i]) {
          token_tdo.attrs = [ [ "style", "text-align:" + aligns[i] ] ];
        }
        const token_il = state.push("inline", "", 0);
        token_il.content = columns[i] ? columns[i].trim() : "";
        token_il.children = [];
        state.push("td_close", "td", -1);
      }
      state.push("tr_close", "tr", -1);
    }
    if (tbodyLines) {
      state.push("tbody_close", "tbody", -1);
      tbodyLines[1] = nextLine;
    }
    state.push("table_close", "table", -1);
    tableLines[1] = nextLine;
    state.parentType = oldParentType;
    state.line = nextLine;
    return true;
  }
  // Code block (4 spaces padded)
    function code(state, startLine, endLine /*, silent */) {
    if (state.sCount[startLine] - state.blkIndent < 4) {
      return false;
    }
    let nextLine = startLine + 1;
    let last = nextLine;
    while (nextLine < endLine) {
      if (state.isEmpty(nextLine)) {
        nextLine++;
        continue;
      }
      if (state.sCount[nextLine] - state.blkIndent >= 4) {
        nextLine++;
        last = nextLine;
        continue;
      }
      break;
    }
    state.line = last;
    const token = state.push("code_block", "code", 0);
    token.content = state.getLines(startLine, last, 4 + state.blkIndent, false) + "\n";
    token.map = [ startLine, state.line ];
    return true;
  }
  // fences (``` lang, ~~~ lang)
    function fence(state, startLine, endLine, silent) {
    let pos = state.bMarks[startLine] + state.tShift[startLine];
    let max = state.eMarks[startLine];
    // if it's indented more than 3 spaces, it should be a code block
        if (state.sCount[startLine] - state.blkIndent >= 4) {
      return false;
    }
    if (pos + 3 > max) {
      return false;
    }
    const marker = state.src.charCodeAt(pos);
    if (marker !== 126 /* ~ */ && marker !== 96 /* ` */) {
      return false;
    }
    // scan marker length
        let mem = pos;
    pos = state.skipChars(pos, marker);
    let len = pos - mem;
    if (len < 3) {
      return false;
    }
    const markup = state.src.slice(mem, pos);
    const params = state.src.slice(pos, max);
    if (marker === 96 /* ` */) {
      if (params.indexOf(String.fromCharCode(marker)) >= 0) {
        return false;
      }
    }
    // Since start is found, we can report success here in validation mode
        if (silent) {
      return true;
    }
    // search end of block
        let nextLine = startLine;
    let haveEndMarker = false;
    for (;;) {
      nextLine++;
      if (nextLine >= endLine) {
        // unclosed block should be autoclosed by end of document.
        // also block seems to be autoclosed by end of parent
        break;
      }
      pos = mem = state.bMarks[nextLine] + state.tShift[nextLine];
      max = state.eMarks[nextLine];
      if (pos < max && state.sCount[nextLine] < state.blkIndent) {
        // non-empty line with negative indent should stop the list:
        // - ```
        //  test
        break;
      }
      if (state.src.charCodeAt(pos) !== marker) {
        continue;
      }
      if (state.sCount[nextLine] - state.blkIndent >= 4) {
        // closing fence should be indented less than 4 spaces
        continue;
      }
      pos = state.skipChars(pos, marker);
      // closing code fence must be at least as long as the opening one
            if (pos - mem < len) {
        continue;
      }
      // make sure tail has spaces only
            pos = state.skipSpaces(pos);
      if (pos < max) {
        continue;
      }
      haveEndMarker = true;
      // found!
            break;
    }
    // If a fence has heading spaces, they should be removed from its inner block
        len = state.sCount[startLine];
    state.line = nextLine + (haveEndMarker ? 1 : 0);
    const token = state.push("fence", "code", 0);
    token.info = params;
    token.content = state.getLines(startLine + 1, nextLine, len, true);
    token.markup = markup;
    token.map = [ startLine, state.line ];
    return true;
  }
  // Block quotes
    function blockquote(state, startLine, endLine, silent) {
    let pos = state.bMarks[startLine] + state.tShift[startLine];
    let max = state.eMarks[startLine];
    const oldLineMax = state.lineMax;
    // if it's indented more than 3 spaces, it should be a code block
        if (state.sCount[startLine] - state.blkIndent >= 4) {
      return false;
    }
    // check the block quote marker
        if (state.src.charCodeAt(pos) !== 62 /* > */) {
      return false;
    }
    // we know that it's going to be a valid blockquote,
    // so no point trying to find the end of it in silent mode
        if (silent) {
      return true;
    }
    const oldBMarks = [];
    const oldBSCount = [];
    const oldSCount = [];
    const oldTShift = [];
    const terminatorRules = state.md.block.ruler.getRules("blockquote");
    const oldParentType = state.parentType;
    state.parentType = "blockquote";
    let lastLineEmpty = false;
    let nextLine;
    // Search the end of the block
    
    // Block ends with either:
    //  1. an empty line outside:
    //     ```
    //     > test
    
    //     ```
    //  2. an empty line inside:
    //     ```
    //     >
    //     test
    //     ```
    //  3. another tag:
    //     ```
    //     > test
    //      - - -
    //     ```
        for (nextLine = startLine; nextLine < endLine; nextLine++) {
      // check if it's outdented, i.e. it's inside list item and indented
      // less than said list item:
      // ```
      // 1. anything
      //    > current blockquote
      // 2. checking this line
      // ```
      const isOutdented = state.sCount[nextLine] < state.blkIndent;
      pos = state.bMarks[nextLine] + state.tShift[nextLine];
      max = state.eMarks[nextLine];
      if (pos >= max) {
        // Case 1: line is not inside the blockquote, and this line is empty.
        break;
      }
      if (state.src.charCodeAt(pos++) === 62 /* > */ && !isOutdented) {
        // This line is inside the blockquote.
        // set offset past spaces and ">"
        let initial = state.sCount[nextLine] + 1;
        let spaceAfterMarker;
        let adjustTab;
        // skip one optional space after '>'
                if (state.src.charCodeAt(pos) === 32 /* space */) {
          // ' >   test '
          //     ^ -- position start of line here:
          pos++;
          initial++;
          adjustTab = false;
          spaceAfterMarker = true;
        } else if (state.src.charCodeAt(pos) === 9 /* tab */) {
          spaceAfterMarker = true;
          if ((state.bsCount[nextLine] + initial) % 4 === 3) {
            // '  >\t  test '
            //       ^ -- position start of line here (tab has width===1)
            pos++;
            initial++;
            adjustTab = false;
          } else {
            // ' >\t  test '
            //    ^ -- position start of line here + shift bsCount slightly
            //         to make extra space appear
            adjustTab = true;
          }
        } else {
          spaceAfterMarker = false;
        }
        let offset = initial;
        oldBMarks.push(state.bMarks[nextLine]);
        state.bMarks[nextLine] = pos;
        while (pos < max) {
          const ch = state.src.charCodeAt(pos);
          if (isSpace(ch)) {
            if (ch === 9) {
              offset += 4 - (offset + state.bsCount[nextLine] + (adjustTab ? 1 : 0)) % 4;
            } else {
              offset++;
            }
          } else {
            break;
          }
          pos++;
        }
        lastLineEmpty = pos >= max;
        oldBSCount.push(state.bsCount[nextLine]);
        state.bsCount[nextLine] = state.sCount[nextLine] + 1 + (spaceAfterMarker ? 1 : 0);
        oldSCount.push(state.sCount[nextLine]);
        state.sCount[nextLine] = offset - initial;
        oldTShift.push(state.tShift[nextLine]);
        state.tShift[nextLine] = pos - state.bMarks[nextLine];
        continue;
      }
      // Case 2: line is not inside the blockquote, and the last line was empty.
            if (lastLineEmpty) {
        break;
      }
      // Case 3: another tag found.
            let terminate = false;
      for (let i = 0, l = terminatorRules.length; i < l; i++) {
        if (terminatorRules[i](state, nextLine, endLine, true)) {
          terminate = true;
          break;
        }
      }
      if (terminate) {
        // Quirk to enforce "hard termination mode" for paragraphs;
        // normally if you call `tokenize(state, startLine, nextLine)`,
        // paragraphs will look below nextLine for paragraph continuation,
        // but if blockquote is terminated by another tag, they shouldn't
        state.lineMax = nextLine;
        if (state.blkIndent !== 0) {
          // state.blkIndent was non-zero, we now set it to zero,
          // so we need to re-calculate all offsets to appear as
          // if indent wasn't changed
          oldBMarks.push(state.bMarks[nextLine]);
          oldBSCount.push(state.bsCount[nextLine]);
          oldTShift.push(state.tShift[nextLine]);
          oldSCount.push(state.sCount[nextLine]);
          state.sCount[nextLine] -= state.blkIndent;
        }
        break;
      }
      oldBMarks.push(state.bMarks[nextLine]);
      oldBSCount.push(state.bsCount[nextLine]);
      oldTShift.push(state.tShift[nextLine]);
      oldSCount.push(state.sCount[nextLine]);
      // A negative indentation means that this is a paragraph continuation
      
            state.sCount[nextLine] = -1;
    }
    const oldIndent = state.blkIndent;
    state.blkIndent = 0;
    const token_o = state.push("blockquote_open", "blockquote", 1);
    token_o.markup = ">";
    const lines = [ startLine, 0 ];
    token_o.map = lines;
    state.md.block.tokenize(state, startLine, nextLine);
    const token_c = state.push("blockquote_close", "blockquote", -1);
    token_c.markup = ">";
    state.lineMax = oldLineMax;
    state.parentType = oldParentType;
    lines[1] = state.line;
    // Restore original tShift; this might not be necessary since the parser
    // has already been here, but just to make sure we can do that.
        for (let i = 0; i < oldTShift.length; i++) {
      state.bMarks[i + startLine] = oldBMarks[i];
      state.tShift[i + startLine] = oldTShift[i];
      state.sCount[i + startLine] = oldSCount[i];
      state.bsCount[i + startLine] = oldBSCount[i];
    }
    state.blkIndent = oldIndent;
    return true;
  }
  // Horizontal rule
    function hr(state, startLine, endLine, silent) {
    const max = state.eMarks[startLine];
    // if it's indented more than 3 spaces, it should be a code block
        if (state.sCount[startLine] - state.blkIndent >= 4) {
      return false;
    }
    let pos = state.bMarks[startLine] + state.tShift[startLine];
    const marker = state.src.charCodeAt(pos++);
    // Check hr marker
        if (marker !== 42 /* * */ && marker !== 45 /* - */ && marker !== 95 /* _ */) {
      return false;
    }
    // markers can be mixed with spaces, but there should be at least 3 of them
        let cnt = 1;
    while (pos < max) {
      const ch = state.src.charCodeAt(pos++);
      if (ch !== marker && !isSpace(ch)) {
        return false;
      }
      if (ch === marker) {
        cnt++;
      }
    }
    if (cnt < 3) {
      return false;
    }
    if (silent) {
      return true;
    }
    state.line = startLine + 1;
    const token = state.push("hr", "hr", 0);
    token.map = [ startLine, state.line ];
    token.markup = Array(cnt + 1).join(String.fromCharCode(marker));
    return true;
  }
  // Lists
  // Search `[-+*][\n ]`, returns next pos after marker on success
  // or -1 on fail.
    function skipBulletListMarker(state, startLine) {
    const max = state.eMarks[startLine];
    let pos = state.bMarks[startLine] + state.tShift[startLine];
    const marker = state.src.charCodeAt(pos++);
    // Check bullet
        if (marker !== 42 /* * */ && marker !== 45 /* - */ && marker !== 43 /* + */) {
      return -1;
    }
    if (pos < max) {
      const ch = state.src.charCodeAt(pos);
      if (!isSpace(ch)) {
        // " -test " - is not a list item
        return -1;
      }
    }
    return pos;
  }
  // Search `\d+[.)][\n ]`, returns next pos after marker on success
  // or -1 on fail.
    function skipOrderedListMarker(state, startLine) {
    const start = state.bMarks[startLine] + state.tShift[startLine];
    const max = state.eMarks[startLine];
    let pos = start;
    // List marker should have at least 2 chars (digit + dot)
        if (pos + 1 >= max) {
      return -1;
    }
    let ch = state.src.charCodeAt(pos++);
    if (ch < 48 /* 0 */ || ch > 57 /* 9 */) {
      return -1;
    }
    for (;;) {
      // EOL -> fail
      if (pos >= max) {
        return -1;
      }
      ch = state.src.charCodeAt(pos++);
      if (ch >= 48 /* 0 */ && ch <= 57 /* 9 */) {
        // List marker should have no more than 9 digits
        // (prevents integer overflow in browsers)
        if (pos - start >= 10) {
          return -1;
        }
        continue;
      }
      // found valid marker
            if (ch === 41 /* ) */ || ch === 46 /* . */) {
        break;
      }
      return -1;
    }
    if (pos < max) {
      ch = state.src.charCodeAt(pos);
      if (!isSpace(ch)) {
        // " 1.test " - is not a list item
        return -1;
      }
    }
    return pos;
  }
  function markTightParagraphs(state, idx) {
    const level = state.level + 2;
    for (let i = idx + 2, l = state.tokens.length - 2; i < l; i++) {
      if (state.tokens[i].level === level && state.tokens[i].type === "paragraph_open") {
        state.tokens[i + 2].hidden = true;
        state.tokens[i].hidden = true;
        i += 2;
      }
    }
  }
  function list(state, startLine, endLine, silent) {
    let max, pos, start, token;
    let nextLine = startLine;
    let tight = true;
    // if it's indented more than 3 spaces, it should be a code block
        if (state.sCount[nextLine] - state.blkIndent >= 4) {
      return false;
    }
    // Special case:
    //  - item 1
    //   - item 2
    //    - item 3
    //     - item 4
    //      - this one is a paragraph continuation
        if (state.listIndent >= 0 && state.sCount[nextLine] - state.listIndent >= 4 && state.sCount[nextLine] < state.blkIndent) {
      return false;
    }
    let isTerminatingParagraph = false;
    // limit conditions when list can interrupt
    // a paragraph (validation mode only)
        if (silent && state.parentType === "paragraph") {
      // Next list item should still terminate previous list item;
      // This code can fail if plugins use blkIndent as well as lists,
      // but I hope the spec gets fixed long before that happens.
      if (state.sCount[nextLine] >= state.blkIndent) {
        isTerminatingParagraph = true;
      }
    }
    // Detect list type and position after marker
        let isOrdered;
    let markerValue;
    let posAfterMarker;
    if ((posAfterMarker = skipOrderedListMarker(state, nextLine)) >= 0) {
      isOrdered = true;
      start = state.bMarks[nextLine] + state.tShift[nextLine];
      markerValue = Number(state.src.slice(start, posAfterMarker - 1));
      // If we're starting a new ordered list right after
      // a paragraph, it should start with 1.
            if (isTerminatingParagraph && markerValue !== 1) return false;
    } else if ((posAfterMarker = skipBulletListMarker(state, nextLine)) >= 0) {
      isOrdered = false;
    } else {
      return false;
    }
    // If we're starting a new unordered list right after
    // a paragraph, first line should not be empty.
        if (isTerminatingParagraph) {
      if (state.skipSpaces(posAfterMarker) >= state.eMarks[nextLine]) return false;
    }
    // For validation mode we can terminate immediately
        if (silent) {
      return true;
    }
    // We should terminate list on style change. Remember first one to compare.
        const markerCharCode = state.src.charCodeAt(posAfterMarker - 1);
    // Start list
        const listTokIdx = state.tokens.length;
    if (isOrdered) {
      token = state.push("ordered_list_open", "ol", 1);
      if (markerValue !== 1) {
        token.attrs = [ [ "start", markerValue ] ];
      }
    } else {
      token = state.push("bullet_list_open", "ul", 1);
    }
    const listLines = [ nextLine, 0 ];
    token.map = listLines;
    token.markup = String.fromCharCode(markerCharCode);
    
    // Iterate list items
    
        let prevEmptyEnd = false;
    const terminatorRules = state.md.block.ruler.getRules("list");
    const oldParentType = state.parentType;
    state.parentType = "list";
    while (nextLine < endLine) {
      pos = posAfterMarker;
      max = state.eMarks[nextLine];
      const initial = state.sCount[nextLine] + posAfterMarker - (state.bMarks[nextLine] + state.tShift[nextLine]);
      let offset = initial;
      while (pos < max) {
        const ch = state.src.charCodeAt(pos);
        if (ch === 9) {
          offset += 4 - (offset + state.bsCount[nextLine]) % 4;
        } else if (ch === 32) {
          offset++;
        } else {
          break;
        }
        pos++;
      }
      const contentStart = pos;
      let indentAfterMarker;
      if (contentStart >= max) {
        // trimming space in "-    \n  3" case, indent is 1 here
        indentAfterMarker = 1;
      } else {
        indentAfterMarker = offset - initial;
      }
      // If we have more than 4 spaces, the indent is 1
      // (the rest is just indented code block)
            if (indentAfterMarker > 4) {
        indentAfterMarker = 1;
      }
      // "  -  test"
      //  ^^^^^ - calculating total length of this thing
            const indent = initial + indentAfterMarker;
      // Run subparser & write tokens
            token = state.push("list_item_open", "li", 1);
      token.markup = String.fromCharCode(markerCharCode);
      const itemLines = [ nextLine, 0 ];
      token.map = itemLines;
      if (isOrdered) {
        token.info = state.src.slice(start, posAfterMarker - 1);
      }
      // change current state, then restore it after parser subcall
            const oldTight = state.tight;
      const oldTShift = state.tShift[nextLine];
      const oldSCount = state.sCount[nextLine];
      //  - example list
      // ^ listIndent position will be here
      //   ^ blkIndent position will be here
      
            const oldListIndent = state.listIndent;
      state.listIndent = state.blkIndent;
      state.blkIndent = indent;
      state.tight = true;
      state.tShift[nextLine] = contentStart - state.bMarks[nextLine];
      state.sCount[nextLine] = offset;
      if (contentStart >= max && state.isEmpty(nextLine + 1)) {
        // workaround for this case
        // (list item is empty, list terminates before "foo"):
        // ~~~~~~~~
        //   -
        //     foo
        // ~~~~~~~~
        state.line = Math.min(state.line + 2, endLine);
      } else {
        state.md.block.tokenize(state, nextLine, endLine, true);
      }
      // If any of list item is tight, mark list as tight
            if (!state.tight || prevEmptyEnd) {
        tight = false;
      }
      // Item become loose if finish with empty line,
      // but we should filter last element, because it means list finish
            prevEmptyEnd = state.line - nextLine > 1 && state.isEmpty(state.line - 1);
      state.blkIndent = state.listIndent;
      state.listIndent = oldListIndent;
      state.tShift[nextLine] = oldTShift;
      state.sCount[nextLine] = oldSCount;
      state.tight = oldTight;
      token = state.push("list_item_close", "li", -1);
      token.markup = String.fromCharCode(markerCharCode);
      nextLine = state.line;
      itemLines[1] = nextLine;
      if (nextLine >= endLine) {
        break;
      }
      
      // Try to check if list is terminated or continued.
      
            if (state.sCount[nextLine] < state.blkIndent) {
        break;
      }
      // if it's indented more than 3 spaces, it should be a code block
            if (state.sCount[nextLine] - state.blkIndent >= 4) {
        break;
      }
      // fail if terminating block found
            let terminate = false;
      for (let i = 0, l = terminatorRules.length; i < l; i++) {
        if (terminatorRules[i](state, nextLine, endLine, true)) {
          terminate = true;
          break;
        }
      }
      if (terminate) {
        break;
      }
      // fail if list has another type
            if (isOrdered) {
        posAfterMarker = skipOrderedListMarker(state, nextLine);
        if (posAfterMarker < 0) {
          break;
        }
        start = state.bMarks[nextLine] + state.tShift[nextLine];
      } else {
        posAfterMarker = skipBulletListMarker(state, nextLine);
        if (posAfterMarker < 0) {
          break;
        }
      }
      if (markerCharCode !== state.src.charCodeAt(posAfterMarker - 1)) {
        break;
      }
    }
    // Finalize list
        if (isOrdered) {
      token = state.push("ordered_list_close", "ol", -1);
    } else {
      token = state.push("bullet_list_close", "ul", -1);
    }
    token.markup = String.fromCharCode(markerCharCode);
    listLines[1] = nextLine;
    state.line = nextLine;
    state.parentType = oldParentType;
    // mark paragraphs tight if needed
        if (tight) {
      markTightParagraphs(state, listTokIdx);
    }
    return true;
  }
  function reference(state, startLine, _endLine, silent) {
    let pos = state.bMarks[startLine] + state.tShift[startLine];
    let max = state.eMarks[startLine];
    let nextLine = startLine + 1;
    // if it's indented more than 3 spaces, it should be a code block
        if (state.sCount[startLine] - state.blkIndent >= 4) {
      return false;
    }
    if (state.src.charCodeAt(pos) !== 91 /* [ */) {
      return false;
    }
    function getNextLine(nextLine) {
      const endLine = state.lineMax;
      if (nextLine >= endLine || state.isEmpty(nextLine)) {
        // empty line or end of input
        return null;
      }
      let isContinuation = false;
      // this would be a code block normally, but after paragraph
      // it's considered a lazy continuation regardless of what's there
            if (state.sCount[nextLine] - state.blkIndent > 3) {
        isContinuation = true;
      }
      // quirk for blockquotes, this line should already be checked by that rule
            if (state.sCount[nextLine] < 0) {
        isContinuation = true;
      }
      if (!isContinuation) {
        const terminatorRules = state.md.block.ruler.getRules("reference");
        const oldParentType = state.parentType;
        state.parentType = "reference";
        // Some tags can terminate paragraph without empty line.
                let terminate = false;
        for (let i = 0, l = terminatorRules.length; i < l; i++) {
          if (terminatorRules[i](state, nextLine, endLine, true)) {
            terminate = true;
            break;
          }
        }
        state.parentType = oldParentType;
        if (terminate) {
          // terminated by another block
          return null;
        }
      }
      const pos = state.bMarks[nextLine] + state.tShift[nextLine];
      const max = state.eMarks[nextLine];
      // max + 1 explicitly includes the newline
            return state.src.slice(pos, max + 1);
    }
    let str = state.src.slice(pos, max + 1);
    max = str.length;
    let labelEnd = -1;
    for (pos = 1; pos < max; pos++) {
      const ch = str.charCodeAt(pos);
      if (ch === 91 /* [ */) {
        return false;
      } else if (ch === 93 /* ] */) {
        labelEnd = pos;
        break;
      } else if (ch === 10 /* \n */) {
        const lineContent = getNextLine(nextLine);
        if (lineContent !== null) {
          str += lineContent;
          max = str.length;
          nextLine++;
        }
      } else if (ch === 92 /* \ */) {
        pos++;
        if (pos < max && str.charCodeAt(pos) === 10) {
          const lineContent = getNextLine(nextLine);
          if (lineContent !== null) {
            str += lineContent;
            max = str.length;
            nextLine++;
          }
        }
      }
    }
    if (labelEnd < 0 || str.charCodeAt(labelEnd + 1) !== 58 /* : */) {
      return false;
    }
    // [label]:   destination   'title'
    //         ^^^ skip optional whitespace here
        for (pos = labelEnd + 2; pos < max; pos++) {
      const ch = str.charCodeAt(pos);
      if (ch === 10) {
        const lineContent = getNextLine(nextLine);
        if (lineContent !== null) {
          str += lineContent;
          max = str.length;
          nextLine++;
        }
      } else if (isSpace(ch)) ; else {
        break;
      }
    }
    // [label]:   destination   'title'
    //            ^^^^^^^^^^^ parse this
        const destRes = state.md.helpers.parseLinkDestination(str, pos, max);
    if (!destRes.ok) {
      return false;
    }
    const href = state.md.normalizeLink(destRes.str);
    if (!state.md.validateLink(href)) {
      return false;
    }
    pos = destRes.pos;
    // save cursor state, we could require to rollback later
        const destEndPos = pos;
    const destEndLineNo = nextLine;
    // [label]:   destination   'title'
    //                       ^^^ skipping those spaces
        const start = pos;
    for (;pos < max; pos++) {
      const ch = str.charCodeAt(pos);
      if (ch === 10) {
        const lineContent = getNextLine(nextLine);
        if (lineContent !== null) {
          str += lineContent;
          max = str.length;
          nextLine++;
        }
      } else if (isSpace(ch)) ; else {
        break;
      }
    }
    // [label]:   destination   'title'
    //                          ^^^^^^^ parse this
        let titleRes = state.md.helpers.parseLinkTitle(str, pos, max);
    while (titleRes.can_continue) {
      const lineContent = getNextLine(nextLine);
      if (lineContent === null) break;
      str += lineContent;
      pos = max;
      max = str.length;
      nextLine++;
      titleRes = state.md.helpers.parseLinkTitle(str, pos, max, titleRes);
    }
    let title;
    if (pos < max && start !== pos && titleRes.ok) {
      title = titleRes.str;
      pos = titleRes.pos;
    } else {
      title = "";
      pos = destEndPos;
      nextLine = destEndLineNo;
    }
    // skip trailing spaces until the rest of the line
        while (pos < max) {
      const ch = str.charCodeAt(pos);
      if (!isSpace(ch)) {
        break;
      }
      pos++;
    }
    if (pos < max && str.charCodeAt(pos) !== 10) {
      if (title) {
        // garbage at the end of the line after title,
        // but it could still be a valid reference if we roll back
        title = "";
        pos = destEndPos;
        nextLine = destEndLineNo;
        while (pos < max) {
          const ch = str.charCodeAt(pos);
          if (!isSpace(ch)) {
            break;
          }
          pos++;
        }
      }
    }
    if (pos < max && str.charCodeAt(pos) !== 10) {
      // garbage at the end of the line
      return false;
    }
    const label = normalizeReference(str.slice(1, labelEnd));
    if (!label) {
      // CommonMark 0.20 disallows empty labels
      return false;
    }
    // Reference can not terminate anything. This check is for safety only.
    /* istanbul ignore if */    if (silent) {
      return true;
    }
    if (typeof state.env.references === "undefined") {
      state.env.references = {};
    }
    if (typeof state.env.references[label] === "undefined") {
      state.env.references[label] = {
        title: title,
        href: href
      };
    }
    state.line = nextLine;
    return true;
  }
  // List of valid html blocks names, according to commonmark spec
  // https://spec.commonmark.org/0.30/#html-blocks
    var block_names = [ "address", "article", "aside", "base", "basefont", "blockquote", "body", "caption", "center", "col", "colgroup", "dd", "details", "dialog", "dir", "div", "dl", "dt", "fieldset", "figcaption", "figure", "footer", "form", "frame", "frameset", "h1", "h2", "h3", "h4", "h5", "h6", "head", "header", "hr", "html", "iframe", "legend", "li", "link", "main", "menu", "menuitem", "nav", "noframes", "ol", "optgroup", "option", "p", "param", "search", "section", "summary", "table", "tbody", "td", "tfoot", "th", "thead", "title", "tr", "track", "ul" ];
  // Regexps to match html elements
    const attr_name = "[a-zA-Z_:][a-zA-Z0-9:._-]*";
  const unquoted = "[^\"'=<>`\\x00-\\x20]+";
  const single_quoted = "'[^']*'";
  const double_quoted = '"[^"]*"';
  const attr_value = "(?:" + unquoted + "|" + single_quoted + "|" + double_quoted + ")";
  const attribute = "(?:\\s+" + attr_name + "(?:\\s*=\\s*" + attr_value + ")?)";
  const open_tag = "<[A-Za-z][A-Za-z0-9\\-]*" + attribute + "*\\s*\\/?>";
  const close_tag = "<\\/[A-Za-z][A-Za-z0-9\\-]*\\s*>";
  const comment = "\x3c!---?>|\x3c!--(?:[^-]|-[^-]|--[^>])*--\x3e";
  const processing = "<[?][\\s\\S]*?[?]>";
  const declaration = "<![A-Za-z][^>]*>";
  const cdata = "<!\\[CDATA\\[[\\s\\S]*?\\]\\]>";
  const HTML_TAG_RE = new RegExp("^(?:" + open_tag + "|" + close_tag + "|" + comment + "|" + processing + "|" + declaration + "|" + cdata + ")");
  const HTML_OPEN_CLOSE_TAG_RE = new RegExp("^(?:" + open_tag + "|" + close_tag + ")");
  // HTML block
  // An array of opening and corresponding closing sequences for html tags,
  // last argument defines whether it can terminate a paragraph or not
  
    const HTML_SEQUENCES = [ [ /^<(script|pre|style|textarea)(?=(\s|>|$))/i, /<\/(script|pre|style|textarea)>/i, true ], [ /^<!--/, /-->/, true ], [ /^<\?/, /\?>/, true ], [ /^<![A-Z]/, />/, true ], [ /^<!\[CDATA\[/, /\]\]>/, true ], [ new RegExp("^</?(" + block_names.join("|") + ")(?=(\\s|/?>|$))", "i"), /^$/, true ], [ new RegExp(HTML_OPEN_CLOSE_TAG_RE.source + "\\s*$"), /^$/, false ] ];
  function html_block(state, startLine, endLine, silent) {
    let pos = state.bMarks[startLine] + state.tShift[startLine];
    let max = state.eMarks[startLine];
    // if it's indented more than 3 spaces, it should be a code block
        if (state.sCount[startLine] - state.blkIndent >= 4) {
      return false;
    }
    if (!state.md.options.html) {
      return false;
    }
    if (state.src.charCodeAt(pos) !== 60 /* < */) {
      return false;
    }
    let lineText = state.src.slice(pos, max);
    let i = 0;
    for (;i < HTML_SEQUENCES.length; i++) {
      if (HTML_SEQUENCES[i][0].test(lineText)) {
        break;
      }
    }
    if (i === HTML_SEQUENCES.length) {
      return false;
    }
    if (silent) {
      // true if this sequence can be a terminator, false otherwise
      return HTML_SEQUENCES[i][2];
    }
    let nextLine = startLine + 1;
    // If we are here - we detected HTML block.
    // Let's roll down till block end.
        if (!HTML_SEQUENCES[i][1].test(lineText)) {
      for (;nextLine < endLine; nextLine++) {
        if (state.sCount[nextLine] < state.blkIndent) {
          break;
        }
        pos = state.bMarks[nextLine] + state.tShift[nextLine];
        max = state.eMarks[nextLine];
        lineText = state.src.slice(pos, max);
        if (HTML_SEQUENCES[i][1].test(lineText)) {
          if (lineText.length !== 0) {
            nextLine++;
          }
          break;
        }
      }
    }
    state.line = nextLine;
    const token = state.push("html_block", "", 0);
    token.map = [ startLine, nextLine ];
    token.content = state.getLines(startLine, nextLine, state.blkIndent, true);
    return true;
  }
  // heading (#, ##, ...)
    function heading(state, startLine, endLine, silent) {
    let pos = state.bMarks[startLine] + state.tShift[startLine];
    let max = state.eMarks[startLine];
    // if it's indented more than 3 spaces, it should be a code block
        if (state.sCount[startLine] - state.blkIndent >= 4) {
      return false;
    }
    let ch = state.src.charCodeAt(pos);
    if (ch !== 35 /* # */ || pos >= max) {
      return false;
    }
    // count heading level
        let level = 1;
    ch = state.src.charCodeAt(++pos);
    while (ch === 35 /* # */ && pos < max && level <= 6) {
      level++;
      ch = state.src.charCodeAt(++pos);
    }
    if (level > 6 || pos < max && !isSpace(ch)) {
      return false;
    }
    if (silent) {
      return true;
    }
    // Let's cut tails like '    ###  ' from the end of string
        max = state.skipSpacesBack(max, pos);
    const tmp = state.skipCharsBack(max, 35, pos);
 // #
        if (tmp > pos && isSpace(state.src.charCodeAt(tmp - 1))) {
      max = tmp;
    }
    state.line = startLine + 1;
    const token_o = state.push("heading_open", "h" + String(level), 1);
    token_o.markup = "########".slice(0, level);
    token_o.map = [ startLine, state.line ];
    const token_i = state.push("inline", "", 0);
    token_i.content = state.src.slice(pos, max).trim();
    token_i.map = [ startLine, state.line ];
    token_i.children = [];
    const token_c = state.push("heading_close", "h" + String(level), -1);
    token_c.markup = "########".slice(0, level);
    return true;
  }
  // lheading (---, ===)
    function lheading(state, startLine, endLine /*, silent */) {
    const terminatorRules = state.md.block.ruler.getRules("paragraph");
    // if it's indented more than 3 spaces, it should be a code block
        if (state.sCount[startLine] - state.blkIndent >= 4) {
      return false;
    }
    const oldParentType = state.parentType;
    state.parentType = "paragraph";
 // use paragraph to match terminatorRules
    // jump line-by-line until empty one or EOF
        let level = 0;
    let marker;
    let nextLine = startLine + 1;
    for (;nextLine < endLine && !state.isEmpty(nextLine); nextLine++) {
      // this would be a code block normally, but after paragraph
      // it's considered a lazy continuation regardless of what's there
      if (state.sCount[nextLine] - state.blkIndent > 3) {
        continue;
      }
      
      // Check for underline in setext header
      
            if (state.sCount[nextLine] >= state.blkIndent) {
        let pos = state.bMarks[nextLine] + state.tShift[nextLine];
        const max = state.eMarks[nextLine];
        if (pos < max) {
          marker = state.src.charCodeAt(pos);
          if (marker === 45 /* - */ || marker === 61 /* = */) {
            pos = state.skipChars(pos, marker);
            pos = state.skipSpaces(pos);
            if (pos >= max) {
              level = marker === 61 /* = */ ? 1 : 2;
              break;
            }
          }
        }
      }
      // quirk for blockquotes, this line should already be checked by that rule
            if (state.sCount[nextLine] < 0) {
        continue;
      }
      // Some tags can terminate paragraph without empty line.
            let terminate = false;
      for (let i = 0, l = terminatorRules.length; i < l; i++) {
        if (terminatorRules[i](state, nextLine, endLine, true)) {
          terminate = true;
          break;
        }
      }
      if (terminate) {
        break;
      }
    }
    if (!level) {
      // Didn't find valid underline
      return false;
    }
    const content = state.getLines(startLine, nextLine, state.blkIndent, false).trim();
    state.line = nextLine + 1;
    const token_o = state.push("heading_open", "h" + String(level), 1);
    token_o.markup = String.fromCharCode(marker);
    token_o.map = [ startLine, state.line ];
    const token_i = state.push("inline", "", 0);
    token_i.content = content;
    token_i.map = [ startLine, state.line - 1 ];
    token_i.children = [];
    const token_c = state.push("heading_close", "h" + String(level), -1);
    token_c.markup = String.fromCharCode(marker);
    state.parentType = oldParentType;
    return true;
  }
  // Paragraph
    function paragraph(state, startLine, endLine) {
    const terminatorRules = state.md.block.ruler.getRules("paragraph");
    const oldParentType = state.parentType;
    let nextLine = startLine + 1;
    state.parentType = "paragraph";
    // jump line-by-line until empty one or EOF
        for (;nextLine < endLine && !state.isEmpty(nextLine); nextLine++) {
      // this would be a code block normally, but after paragraph
      // it's considered a lazy continuation regardless of what's there
      if (state.sCount[nextLine] - state.blkIndent > 3) {
        continue;
      }
      // quirk for blockquotes, this line should already be checked by that rule
            if (state.sCount[nextLine] < 0) {
        continue;
      }
      // Some tags can terminate paragraph without empty line.
            let terminate = false;
      for (let i = 0, l = terminatorRules.length; i < l; i++) {
        if (terminatorRules[i](state, nextLine, endLine, true)) {
          terminate = true;
          break;
        }
      }
      if (terminate) {
        break;
      }
    }
    const content = state.getLines(startLine, nextLine, state.blkIndent, false).trim();
    state.line = nextLine;
    const token_o = state.push("paragraph_open", "p", 1);
    token_o.map = [ startLine, state.line ];
    const token_i = state.push("inline", "", 0);
    token_i.content = content;
    token_i.map = [ startLine, state.line ];
    token_i.children = [];
    state.push("paragraph_close", "p", -1);
    state.parentType = oldParentType;
    return true;
  }
  /** internal
   * class ParserBlock
   *
   * Block-level tokenizer.
   **/  const _rules$1 = [ 
  // First 2 params - rule name & source. Secondary array - list of rules,
  // which can be terminated by this one.
  [ "table", table, [ "paragraph", "reference" ] ], [ "code", code ], [ "fence", fence, [ "paragraph", "reference", "blockquote", "list" ] ], [ "blockquote", blockquote, [ "paragraph", "reference", "blockquote", "list" ] ], [ "hr", hr, [ "paragraph", "reference", "blockquote", "list" ] ], [ "list", list, [ "paragraph", "reference", "blockquote" ] ], [ "reference", reference ], [ "html_block", html_block, [ "paragraph", "reference", "blockquote" ] ], [ "heading", heading, [ "paragraph", "reference", "blockquote" ] ], [ "lheading", lheading ], [ "paragraph", paragraph ] ];
  /**
   * new ParserBlock()
   **/  function ParserBlock() {
    /**
     * ParserBlock#ruler -> Ruler
     *
     * [[Ruler]] instance. Keep configuration of block rules.
     **/
    this.ruler = new Ruler;
    for (let i = 0; i < _rules$1.length; i++) {
      this.ruler.push(_rules$1[i][0], _rules$1[i][1], {
        alt: (_rules$1[i][2] || []).slice()
      });
    }
  }
  // Generate tokens for input range
  
    ParserBlock.prototype.tokenize = function(state, startLine, endLine) {
    const rules = this.ruler.getRules("");
    const len = rules.length;
    const maxNesting = state.md.options.maxNesting;
    let line = startLine;
    let hasEmptyLines = false;
    while (line < endLine) {
      state.line = line = state.skipEmptyLines(line);
      if (line >= endLine) {
        break;
      }
      // Termination condition for nested calls.
      // Nested calls currently used for blockquotes & lists
            if (state.sCount[line] < state.blkIndent) {
        break;
      }
      // If nesting level exceeded - skip tail to the end. That's not ordinary
      // situation and we should not care about content.
            if (state.level >= maxNesting) {
        state.line = endLine;
        break;
      }
      // Try all possible rules.
      // On success, rule should:
      
      // - update `state.line`
      // - update `state.tokens`
      // - return true
            const prevLine = state.line;
      let ok = false;
      for (let i = 0; i < len; i++) {
        ok = rules[i](state, line, endLine, false);
        if (ok) {
          if (prevLine >= state.line) {
            throw new Error("block rule didn't increment state.line");
          }
          break;
        }
      }
      // this can only happen if user disables paragraph rule
            if (!ok) throw new Error("none of the block rules matched");
      // set state.tight if we had an empty line before current tag
      // i.e. latest empty line should not count
            state.tight = !hasEmptyLines;
      // paragraph might "eat" one newline after it in nested lists
            if (state.isEmpty(state.line - 1)) {
        hasEmptyLines = true;
      }
      line = state.line;
      if (line < endLine && state.isEmpty(line)) {
        hasEmptyLines = true;
        line++;
        state.line = line;
      }
    }
  };
  /**
   * ParserBlock.parse(str, md, env, outTokens)
   *
   * Process input string and push block tokens into `outTokens`
   **/  ParserBlock.prototype.parse = function(src, md, env, outTokens) {
    if (!src) {
      return;
    }
    const state = new this.State(src, md, env, outTokens);
    this.tokenize(state, state.line, state.lineMax);
  };
  ParserBlock.prototype.State = StateBlock;
  // Inline parser state
    function StateInline(src, md, env, outTokens) {
    this.src = src;
    this.env = env;
    this.md = md;
    this.tokens = outTokens;
    this.tokens_meta = Array(outTokens.length);
    this.pos = 0;
    this.posMax = this.src.length;
    this.level = 0;
    this.pending = "";
    this.pendingLevel = 0;
    // Stores { start: end } pairs. Useful for backtrack
    // optimization of pairs parse (emphasis, strikes).
        this.cache = {};
    // List of emphasis-like delimiters for current tag
        this.delimiters = [];
    // Stack of delimiter lists for upper level tags
        this._prev_delimiters = [];
    // backtick length => last seen position
        this.backticks = {};
    this.backticksScanned = false;
    // Counter used to disable inline linkify-it execution
    // inside <a> and markdown links
        this.linkLevel = 0;
  }
  // Flush pending text
  
    StateInline.prototype.pushPending = function() {
    const token = new Token("text", "", 0);
    token.content = this.pending;
    token.level = this.pendingLevel;
    this.tokens.push(token);
    this.pending = "";
    return token;
  };
  // Push new token to "stream".
  // If pending text exists - flush it as text token
  
    StateInline.prototype.push = function(type, tag, nesting) {
    if (this.pending) {
      this.pushPending();
    }
    const token = new Token(type, tag, nesting);
    let token_meta = null;
    if (nesting < 0) {
      // closing tag
      this.level--;
      this.delimiters = this._prev_delimiters.pop();
    }
    token.level = this.level;
    if (nesting > 0) {
      // opening tag
      this.level++;
      this._prev_delimiters.push(this.delimiters);
      this.delimiters = [];
      token_meta = {
        delimiters: this.delimiters
      };
    }
    this.pendingLevel = this.level;
    this.tokens.push(token);
    this.tokens_meta.push(token_meta);
    return token;
  };
  // Scan a sequence of emphasis-like markers, and determine whether
  // it can start an emphasis sequence or end an emphasis sequence.
  
  //  - start - position to scan from (it should point at a valid marker);
  //  - canSplitWord - determine if these markers can be found inside a word
  
    StateInline.prototype.scanDelims = function(start, canSplitWord) {
    const max = this.posMax;
    const marker = this.src.charCodeAt(start);
    // treat beginning of the line as a whitespace
        const lastChar = start > 0 ? this.src.charCodeAt(start - 1) : 32;
    let pos = start;
    while (pos < max && this.src.charCodeAt(pos) === marker) {
      pos++;
    }
    const count = pos - start;
    // treat end of the line as a whitespace
        const nextChar = pos < max ? this.src.charCodeAt(pos) : 32;
    const isLastPunctChar = isMdAsciiPunct(lastChar) || isPunctChar(String.fromCharCode(lastChar));
    const isNextPunctChar = isMdAsciiPunct(nextChar) || isPunctChar(String.fromCharCode(nextChar));
    const isLastWhiteSpace = isWhiteSpace(lastChar);
    const isNextWhiteSpace = isWhiteSpace(nextChar);
    const left_flanking = !isNextWhiteSpace && (!isNextPunctChar || isLastWhiteSpace || isLastPunctChar);
    const right_flanking = !isLastWhiteSpace && (!isLastPunctChar || isNextWhiteSpace || isNextPunctChar);
    const can_open = left_flanking && (canSplitWord || !right_flanking || isLastPunctChar);
    const can_close = right_flanking && (canSplitWord || !left_flanking || isNextPunctChar);
    return {
      can_open: can_open,
      can_close: can_close,
      length: count
    };
  };
  // re-export Token class to use in block rules
    StateInline.prototype.Token = Token;
  // Skip text characters for text token, place those to pending buffer
  // and increment current pos
  // Rule to skip pure text
  // '{}$%@~+=:' reserved for extentions
  // !, ", #, $, %, &, ', (, ), *, +, ,, -, ., /, :, ;, <, =, >, ?, @, [, \, ], ^, _, `, {, |, }, or ~
  // !!!! Don't confuse with "Markdown ASCII Punctuation" chars
  // http://spec.commonmark.org/0.15/#ascii-punctuation-character
    function isTerminatorChar(ch) {
    switch (ch) {
     case 10 /* \n */ :
     case 33 /* ! */ :
     case 35 /* # */ :
     case 36 /* $ */ :
     case 37 /* % */ :
     case 38 /* & */ :
     case 42 /* * */ :
     case 43 /* + */ :
     case 45 /* - */ :
     case 58 /* : */ :
     case 60 /* < */ :
     case 61 /* = */ :
     case 62 /* > */ :
     case 64 /* @ */ :
     case 91 /* [ */ :
     case 92 /* \ */ :
     case 93 /* ] */ :
     case 94 /* ^ */ :
     case 95 /* _ */ :
     case 96 /* ` */ :
     case 123 /* { */ :
     case 125 /* } */ :
     case 126 /* ~ */ :
      return true;

     default:
      return false;
    }
  }
  function text(state, silent) {
    let pos = state.pos;
    while (pos < state.posMax && !isTerminatorChar(state.src.charCodeAt(pos))) {
      pos++;
    }
    if (pos === state.pos) {
      return false;
    }
    if (!silent) {
      state.pending += state.src.slice(state.pos, pos);
    }
    state.pos = pos;
    return true;
  }
  // Alternative implementation, for memory.
  
  // It costs 10% of performance, but allows extend terminators list, if place it
  // to `ParserInline` property. Probably, will switch to it sometime, such
  // flexibility required.
  /*
  var TERMINATOR_RE = /[\n!#$%&*+\-:<=>@[\\\]^_`{}~]/;

  module.exports = function text(state, silent) {
    var pos = state.pos,
        idx = state.src.slice(pos).search(TERMINATOR_RE);

    // first char is terminator -> empty text
    if (idx === 0) { return false; }

    // no terminator -> text till end of string
    if (idx < 0) {
      if (!silent) { state.pending += state.src.slice(pos); }
      state.pos = state.src.length;
      return true;
    }

    if (!silent) { state.pending += state.src.slice(pos, pos + idx); }

    state.pos += idx;

    return true;
  }; */
  // Process links like https://example.org/
  // RFC3986: scheme = ALPHA *( ALPHA / DIGIT / "+" / "-" / "." )
    const SCHEME_RE = /(?:^|[^a-z0-9.+-])([a-z][a-z0-9.+-]*)$/i;
  function linkify(state, silent) {
    if (!state.md.options.linkify) return false;
    if (state.linkLevel > 0) return false;
    const pos = state.pos;
    const max = state.posMax;
    if (pos + 3 > max) return false;
    if (state.src.charCodeAt(pos) !== 58 /* : */) return false;
    if (state.src.charCodeAt(pos + 1) !== 47 /* / */) return false;
    if (state.src.charCodeAt(pos + 2) !== 47 /* / */) return false;
    const match = state.pending.match(SCHEME_RE);
    if (!match) return false;
    const proto = match[1];
    const link = state.md.linkify.matchAtStart(state.src.slice(pos - proto.length));
    if (!link) return false;
    let url = link.url;
    // invalid link, but still detected by linkify somehow;
    // need to check to prevent infinite loop below
        if (url.length <= proto.length) return false;
    // disallow '*' at the end of the link (conflicts with emphasis)
        url = url.replace(/\*+$/, "");
    const fullUrl = state.md.normalizeLink(url);
    if (!state.md.validateLink(fullUrl)) return false;
    if (!silent) {
      state.pending = state.pending.slice(0, -proto.length);
      const token_o = state.push("link_open", "a", 1);
      token_o.attrs = [ [ "href", fullUrl ] ];
      token_o.markup = "linkify";
      token_o.info = "auto";
      const token_t = state.push("text", "", 0);
      token_t.content = state.md.normalizeLinkText(url);
      const token_c = state.push("link_close", "a", -1);
      token_c.markup = "linkify";
      token_c.info = "auto";
    }
    state.pos += url.length - proto.length;
    return true;
  }
  // Proceess '\n'
    function newline(state, silent) {
    let pos = state.pos;
    if (state.src.charCodeAt(pos) !== 10 /* \n */) {
      return false;
    }
    const pmax = state.pending.length - 1;
    const max = state.posMax;
    // '  \n' -> hardbreak
    // Lookup in pending chars is bad practice! Don't copy to other rules!
    // Pending string is stored in concat mode, indexed lookups will cause
    // convertion to flat mode.
        if (!silent) {
      if (pmax >= 0 && state.pending.charCodeAt(pmax) === 32) {
        if (pmax >= 1 && state.pending.charCodeAt(pmax - 1) === 32) {
          // Find whitespaces tail of pending chars.
          let ws = pmax - 1;
          while (ws >= 1 && state.pending.charCodeAt(ws - 1) === 32) ws--;
          state.pending = state.pending.slice(0, ws);
          state.push("hardbreak", "br", 0);
        } else {
          state.pending = state.pending.slice(0, -1);
          state.push("softbreak", "br", 0);
        }
      } else {
        state.push("softbreak", "br", 0);
      }
    }
    pos++;
    // skip heading spaces for next line
        while (pos < max && isSpace(state.src.charCodeAt(pos))) {
      pos++;
    }
    state.pos = pos;
    return true;
  }
  // Process escaped chars and hardbreaks
    const ESCAPED = [];
  for (let i = 0; i < 256; i++) {
    ESCAPED.push(0);
  }
  "\\!\"#$%&'()*+,./:;<=>?@[]^_`{|}~-".split("").forEach((function(ch) {
    ESCAPED[ch.charCodeAt(0)] = 1;
  }));
  function escape(state, silent) {
    let pos = state.pos;
    const max = state.posMax;
    if (state.src.charCodeAt(pos) !== 92 /* \ */) return false;
    pos++;
    // '\' at the end of the inline block
        if (pos >= max) return false;
    let ch1 = state.src.charCodeAt(pos);
    if (ch1 === 10) {
      if (!silent) {
        state.push("hardbreak", "br", 0);
      }
      pos++;
      // skip leading whitespaces from next line
            while (pos < max) {
        ch1 = state.src.charCodeAt(pos);
        if (!isSpace(ch1)) break;
        pos++;
      }
      state.pos = pos;
      return true;
    }
    let escapedStr = state.src[pos];
    if (ch1 >= 55296 && ch1 <= 56319 && pos + 1 < max) {
      const ch2 = state.src.charCodeAt(pos + 1);
      if (ch2 >= 56320 && ch2 <= 57343) {
        escapedStr += state.src[pos + 1];
        pos++;
      }
    }
    const origStr = "\\" + escapedStr;
    if (!silent) {
      const token = state.push("text_special", "", 0);
      if (ch1 < 256 && ESCAPED[ch1] !== 0) {
        token.content = escapedStr;
      } else {
        token.content = origStr;
      }
      token.markup = origStr;
      token.info = "escape";
    }
    state.pos = pos + 1;
    return true;
  }
  // Parse backticks
    function backtick(state, silent) {
    let pos = state.pos;
    const ch = state.src.charCodeAt(pos);
    if (ch !== 96 /* ` */) {
      return false;
    }
    const start = pos;
    pos++;
    const max = state.posMax;
    // scan marker length
        while (pos < max && state.src.charCodeAt(pos) === 96 /* ` */) {
      pos++;
    }
    const marker = state.src.slice(start, pos);
    const openerLength = marker.length;
    if (state.backticksScanned && (state.backticks[openerLength] || 0) <= start) {
      if (!silent) state.pending += marker;
      state.pos += openerLength;
      return true;
    }
    let matchEnd = pos;
    let matchStart;
    // Nothing found in the cache, scan until the end of the line (or until marker is found)
        while ((matchStart = state.src.indexOf("`", matchEnd)) !== -1) {
      matchEnd = matchStart + 1;
      // scan marker length
            while (matchEnd < max && state.src.charCodeAt(matchEnd) === 96 /* ` */) {
        matchEnd++;
      }
      const closerLength = matchEnd - matchStart;
      if (closerLength === openerLength) {
        // Found matching closer length.
        if (!silent) {
          const token = state.push("code_inline", "code", 0);
          token.markup = marker;
          token.content = state.src.slice(pos, matchStart).replace(/\n/g, " ").replace(/^ (.+) $/, "$1");
        }
        state.pos = matchEnd;
        return true;
      }
      // Some different length found, put it in cache as upper limit of where closer can be found
            state.backticks[closerLength] = matchStart;
    }
    // Scanned through the end, didn't find anything
        state.backticksScanned = true;
    if (!silent) state.pending += marker;
    state.pos += openerLength;
    return true;
  }
  // ~~strike through~~
  
  // Insert each marker as a separate text token, and add it to delimiter list
  
    function strikethrough_tokenize(state, silent) {
    const start = state.pos;
    const marker = state.src.charCodeAt(start);
    if (silent) {
      return false;
    }
    if (marker !== 126 /* ~ */) {
      return false;
    }
    const scanned = state.scanDelims(state.pos, true);
    let len = scanned.length;
    const ch = String.fromCharCode(marker);
    if (len < 2) {
      return false;
    }
    let token;
    if (len % 2) {
      token = state.push("text", "", 0);
      token.content = ch;
      len--;
    }
    for (let i = 0; i < len; i += 2) {
      token = state.push("text", "", 0);
      token.content = ch + ch;
      state.delimiters.push({
        marker: marker,
        length: 0,
        // disable "rule of 3" length checks meant for emphasis
        token: state.tokens.length - 1,
        end: -1,
        open: scanned.can_open,
        close: scanned.can_close
      });
    }
    state.pos += scanned.length;
    return true;
  }
  function postProcess$1(state, delimiters) {
    let token;
    const loneMarkers = [];
    const max = delimiters.length;
    for (let i = 0; i < max; i++) {
      const startDelim = delimiters[i];
      if (startDelim.marker !== 126 /* ~ */) {
        continue;
      }
      if (startDelim.end === -1) {
        continue;
      }
      const endDelim = delimiters[startDelim.end];
      token = state.tokens[startDelim.token];
      token.type = "s_open";
      token.tag = "s";
      token.nesting = 1;
      token.markup = "~~";
      token.content = "";
      token = state.tokens[endDelim.token];
      token.type = "s_close";
      token.tag = "s";
      token.nesting = -1;
      token.markup = "~~";
      token.content = "";
      if (state.tokens[endDelim.token - 1].type === "text" && state.tokens[endDelim.token - 1].content === "~") {
        loneMarkers.push(endDelim.token - 1);
      }
    }
    // If a marker sequence has an odd number of characters, it's splitted
    // like this: `~~~~~` -> `~` + `~~` + `~~`, leaving one marker at the
    // start of the sequence.
    
    // So, we have to move all those markers after subsequent s_close tags.
    
        while (loneMarkers.length) {
      const i = loneMarkers.pop();
      let j = i + 1;
      while (j < state.tokens.length && state.tokens[j].type === "s_close") {
        j++;
      }
      j--;
      if (i !== j) {
        token = state.tokens[j];
        state.tokens[j] = state.tokens[i];
        state.tokens[i] = token;
      }
    }
  }
  // Walk through delimiter list and replace text tokens with tags
  
    function strikethrough_postProcess(state) {
    const tokens_meta = state.tokens_meta;
    const max = state.tokens_meta.length;
    postProcess$1(state, state.delimiters);
    for (let curr = 0; curr < max; curr++) {
      if (tokens_meta[curr] && tokens_meta[curr].delimiters) {
        postProcess$1(state, tokens_meta[curr].delimiters);
      }
    }
  }
  var r_strikethrough = {
    tokenize: strikethrough_tokenize,
    postProcess: strikethrough_postProcess
  };
  // Process *this* and _that_
  
  // Insert each marker as a separate text token, and add it to delimiter list
  
    function emphasis_tokenize(state, silent) {
    const start = state.pos;
    const marker = state.src.charCodeAt(start);
    if (silent) {
      return false;
    }
    if (marker !== 95 /* _ */ && marker !== 42 /* * */) {
      return false;
    }
    const scanned = state.scanDelims(state.pos, marker === 42);
    for (let i = 0; i < scanned.length; i++) {
      const token = state.push("text", "", 0);
      token.content = String.fromCharCode(marker);
      state.delimiters.push({
        // Char code of the starting marker (number).
        marker: marker,
        // Total length of these series of delimiters.
        length: scanned.length,
        // A position of the token this delimiter corresponds to.
        token: state.tokens.length - 1,
        // If this delimiter is matched as a valid opener, `end` will be
        // equal to its position, otherwise it's `-1`.
        end: -1,
        // Boolean flags that determine if this delimiter could open or close
        // an emphasis.
        open: scanned.can_open,
        close: scanned.can_close
      });
    }
    state.pos += scanned.length;
    return true;
  }
  function postProcess(state, delimiters) {
    const max = delimiters.length;
    for (let i = max - 1; i >= 0; i--) {
      const startDelim = delimiters[i];
      if (startDelim.marker !== 95 /* _ */ && startDelim.marker !== 42 /* * */) {
        continue;
      }
      // Process only opening markers
            if (startDelim.end === -1) {
        continue;
      }
      const endDelim = delimiters[startDelim.end];
      // If the previous delimiter has the same marker and is adjacent to this one,
      // merge those into one strong delimiter.
      
      // `<em><em>whatever</em></em>` -> `<strong>whatever</strong>`
      
            const isStrong = i > 0 && delimiters[i - 1].end === startDelim.end + 1 && 
      // check that first two markers match and adjacent
      delimiters[i - 1].marker === startDelim.marker && delimiters[i - 1].token === startDelim.token - 1 && 
      // check that last two markers are adjacent (we can safely assume they match)
      delimiters[startDelim.end + 1].token === endDelim.token + 1;
      const ch = String.fromCharCode(startDelim.marker);
      const token_o = state.tokens[startDelim.token];
      token_o.type = isStrong ? "strong_open" : "em_open";
      token_o.tag = isStrong ? "strong" : "em";
      token_o.nesting = 1;
      token_o.markup = isStrong ? ch + ch : ch;
      token_o.content = "";
      const token_c = state.tokens[endDelim.token];
      token_c.type = isStrong ? "strong_close" : "em_close";
      token_c.tag = isStrong ? "strong" : "em";
      token_c.nesting = -1;
      token_c.markup = isStrong ? ch + ch : ch;
      token_c.content = "";
      if (isStrong) {
        state.tokens[delimiters[i - 1].token].content = "";
        state.tokens[delimiters[startDelim.end + 1].token].content = "";
        i--;
      }
    }
  }
  // Walk through delimiter list and replace text tokens with tags
  
    function emphasis_post_process(state) {
    const tokens_meta = state.tokens_meta;
    const max = state.tokens_meta.length;
    postProcess(state, state.delimiters);
    for (let curr = 0; curr < max; curr++) {
      if (tokens_meta[curr] && tokens_meta[curr].delimiters) {
        postProcess(state, tokens_meta[curr].delimiters);
      }
    }
  }
  var r_emphasis = {
    tokenize: emphasis_tokenize,
    postProcess: emphasis_post_process
  };
  // Process [link](<to> "stuff")
    function link(state, silent) {
    let code, label, res, ref;
    let href = "";
    let title = "";
    let start = state.pos;
    let parseReference = true;
    if (state.src.charCodeAt(state.pos) !== 91 /* [ */) {
      return false;
    }
    const oldPos = state.pos;
    const max = state.posMax;
    const labelStart = state.pos + 1;
    const labelEnd = state.md.helpers.parseLinkLabel(state, state.pos, true);
    // parser failed to find ']', so it's not a valid link
        if (labelEnd < 0) {
      return false;
    }
    let pos = labelEnd + 1;
    if (pos < max && state.src.charCodeAt(pos) === 40 /* ( */) {
      // Inline link
      // might have found a valid shortcut link, disable reference parsing
      parseReference = false;
      // [link](  <href>  "title"  )
      //        ^^ skipping these spaces
            pos++;
      for (;pos < max; pos++) {
        code = state.src.charCodeAt(pos);
        if (!isSpace(code) && code !== 10) {
          break;
        }
      }
      if (pos >= max) {
        return false;
      }
      // [link](  <href>  "title"  )
      //          ^^^^^^ parsing link destination
            start = pos;
      res = state.md.helpers.parseLinkDestination(state.src, pos, state.posMax);
      if (res.ok) {
        href = state.md.normalizeLink(res.str);
        if (state.md.validateLink(href)) {
          pos = res.pos;
        } else {
          href = "";
        }
        // [link](  <href>  "title"  )
        //                ^^ skipping these spaces
                start = pos;
        for (;pos < max; pos++) {
          code = state.src.charCodeAt(pos);
          if (!isSpace(code) && code !== 10) {
            break;
          }
        }
        // [link](  <href>  "title"  )
        //                  ^^^^^^^ parsing link title
                res = state.md.helpers.parseLinkTitle(state.src, pos, state.posMax);
        if (pos < max && start !== pos && res.ok) {
          title = res.str;
          pos = res.pos;
          // [link](  <href>  "title"  )
          //                         ^^ skipping these spaces
                    for (;pos < max; pos++) {
            code = state.src.charCodeAt(pos);
            if (!isSpace(code) && code !== 10) {
              break;
            }
          }
        }
      }
      if (pos >= max || state.src.charCodeAt(pos) !== 41 /* ) */) {
        // parsing a valid shortcut link failed, fallback to reference
        parseReference = true;
      }
      pos++;
    }
    if (parseReference) {
      // Link reference
      if (typeof state.env.references === "undefined") {
        return false;
      }
      if (pos < max && state.src.charCodeAt(pos) === 91 /* [ */) {
        start = pos + 1;
        pos = state.md.helpers.parseLinkLabel(state, pos);
        if (pos >= 0) {
          label = state.src.slice(start, pos++);
        } else {
          pos = labelEnd + 1;
        }
      } else {
        pos = labelEnd + 1;
      }
      // covers label === '' and label === undefined
      // (collapsed reference link and shortcut reference link respectively)
            if (!label) {
        label = state.src.slice(labelStart, labelEnd);
      }
      ref = state.env.references[normalizeReference(label)];
      if (!ref) {
        state.pos = oldPos;
        return false;
      }
      href = ref.href;
      title = ref.title;
    }
    
    // We found the end of the link, and know for a fact it's a valid link;
    // so all that's left to do is to call tokenizer.
    
        if (!silent) {
      state.pos = labelStart;
      state.posMax = labelEnd;
      const token_o = state.push("link_open", "a", 1);
      const attrs = [ [ "href", href ] ];
      token_o.attrs = attrs;
      if (title) {
        attrs.push([ "title", title ]);
      }
      state.linkLevel++;
      state.md.inline.tokenize(state);
      state.linkLevel--;
      state.push("link_close", "a", -1);
    }
    state.pos = pos;
    state.posMax = max;
    return true;
  }
  // Process ![image](<src> "title")
    function image(state, silent) {
    let code, content, label, pos, ref, res, title, start;
    let href = "";
    const oldPos = state.pos;
    const max = state.posMax;
    if (state.src.charCodeAt(state.pos) !== 33 /* ! */) {
      return false;
    }
    if (state.src.charCodeAt(state.pos + 1) !== 91 /* [ */) {
      return false;
    }
    const labelStart = state.pos + 2;
    const labelEnd = state.md.helpers.parseLinkLabel(state, state.pos + 1, false);
    // parser failed to find ']', so it's not a valid link
        if (labelEnd < 0) {
      return false;
    }
    pos = labelEnd + 1;
    if (pos < max && state.src.charCodeAt(pos) === 40 /* ( */) {
      // Inline link
      // [link](  <href>  "title"  )
      //        ^^ skipping these spaces
      pos++;
      for (;pos < max; pos++) {
        code = state.src.charCodeAt(pos);
        if (!isSpace(code) && code !== 10) {
          break;
        }
      }
      if (pos >= max) {
        return false;
      }
      // [link](  <href>  "title"  )
      //          ^^^^^^ parsing link destination
            start = pos;
      res = state.md.helpers.parseLinkDestination(state.src, pos, state.posMax);
      if (res.ok) {
        href = state.md.normalizeLink(res.str);
        if (state.md.validateLink(href)) {
          pos = res.pos;
        } else {
          href = "";
        }
      }
      // [link](  <href>  "title"  )
      //                ^^ skipping these spaces
            start = pos;
      for (;pos < max; pos++) {
        code = state.src.charCodeAt(pos);
        if (!isSpace(code) && code !== 10) {
          break;
        }
      }
      // [link](  <href>  "title"  )
      //                  ^^^^^^^ parsing link title
            res = state.md.helpers.parseLinkTitle(state.src, pos, state.posMax);
      if (pos < max && start !== pos && res.ok) {
        title = res.str;
        pos = res.pos;
        // [link](  <href>  "title"  )
        //                         ^^ skipping these spaces
                for (;pos < max; pos++) {
          code = state.src.charCodeAt(pos);
          if (!isSpace(code) && code !== 10) {
            break;
          }
        }
      } else {
        title = "";
      }
      if (pos >= max || state.src.charCodeAt(pos) !== 41 /* ) */) {
        state.pos = oldPos;
        return false;
      }
      pos++;
    } else {
      // Link reference
      if (typeof state.env.references === "undefined") {
        return false;
      }
      if (pos < max && state.src.charCodeAt(pos) === 91 /* [ */) {
        start = pos + 1;
        pos = state.md.helpers.parseLinkLabel(state, pos);
        if (pos >= 0) {
          label = state.src.slice(start, pos++);
        } else {
          pos = labelEnd + 1;
        }
      } else {
        pos = labelEnd + 1;
      }
      // covers label === '' and label === undefined
      // (collapsed reference link and shortcut reference link respectively)
            if (!label) {
        label = state.src.slice(labelStart, labelEnd);
      }
      ref = state.env.references[normalizeReference(label)];
      if (!ref) {
        state.pos = oldPos;
        return false;
      }
      href = ref.href;
      title = ref.title;
    }
    
    // We found the end of the link, and know for a fact it's a valid link;
    // so all that's left to do is to call tokenizer.
    
        if (!silent) {
      content = state.src.slice(labelStart, labelEnd);
      const tokens = [];
      state.md.inline.parse(content, state.md, state.env, tokens);
      const token = state.push("image", "img", 0);
      const attrs = [ [ "src", href ], [ "alt", "" ] ];
      token.attrs = attrs;
      token.children = tokens;
      token.content = content;
      if (title) {
        attrs.push([ "title", title ]);
      }
    }
    state.pos = pos;
    state.posMax = max;
    return true;
  }
  // Process autolinks '<protocol:...>'
  /* eslint max-len:0 */  const EMAIL_RE = /^([a-zA-Z0-9.!#$%&'*+/=?^_`{|}~-]+@[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)*)$/;
  /* eslint-disable-next-line no-control-regex */  const AUTOLINK_RE = /^([a-zA-Z][a-zA-Z0-9+.-]{1,31}):([^<>\x00-\x20]*)$/;
  function autolink(state, silent) {
    let pos = state.pos;
    if (state.src.charCodeAt(pos) !== 60 /* < */) {
      return false;
    }
    const start = state.pos;
    const max = state.posMax;
    for (;;) {
      if (++pos >= max) return false;
      const ch = state.src.charCodeAt(pos);
      if (ch === 60 /* < */) return false;
      if (ch === 62 /* > */) break;
    }
    const url = state.src.slice(start + 1, pos);
    if (AUTOLINK_RE.test(url)) {
      const fullUrl = state.md.normalizeLink(url);
      if (!state.md.validateLink(fullUrl)) {
        return false;
      }
      if (!silent) {
        const token_o = state.push("link_open", "a", 1);
        token_o.attrs = [ [ "href", fullUrl ] ];
        token_o.markup = "autolink";
        token_o.info = "auto";
        const token_t = state.push("text", "", 0);
        token_t.content = state.md.normalizeLinkText(url);
        const token_c = state.push("link_close", "a", -1);
        token_c.markup = "autolink";
        token_c.info = "auto";
      }
      state.pos += url.length + 2;
      return true;
    }
    if (EMAIL_RE.test(url)) {
      const fullUrl = state.md.normalizeLink("mailto:" + url);
      if (!state.md.validateLink(fullUrl)) {
        return false;
      }
      if (!silent) {
        const token_o = state.push("link_open", "a", 1);
        token_o.attrs = [ [ "href", fullUrl ] ];
        token_o.markup = "autolink";
        token_o.info = "auto";
        const token_t = state.push("text", "", 0);
        token_t.content = state.md.normalizeLinkText(url);
        const token_c = state.push("link_close", "a", -1);
        token_c.markup = "autolink";
        token_c.info = "auto";
      }
      state.pos += url.length + 2;
      return true;
    }
    return false;
  }
  // Process html tags
    function isLinkOpen(str) {
    return /^<a[>\s]/i.test(str);
  }
  function isLinkClose(str) {
    return /^<\/a\s*>/i.test(str);
  }
  function isLetter(ch) {
    /* eslint no-bitwise:0 */
    const lc = ch | 32;
 // to lower case
        return lc >= 97 /* a */ && lc <= 122 /* z */;
  }
  function html_inline(state, silent) {
    if (!state.md.options.html) {
      return false;
    }
    // Check start
        const max = state.posMax;
    const pos = state.pos;
    if (state.src.charCodeAt(pos) !== 60 /* < */ || pos + 2 >= max) {
      return false;
    }
    // Quick fail on second char
        const ch = state.src.charCodeAt(pos + 1);
    if (ch !== 33 /* ! */ && ch !== 63 /* ? */ && ch !== 47 /* / */ && !isLetter(ch)) {
      return false;
    }
    const match = state.src.slice(pos).match(HTML_TAG_RE);
    if (!match) {
      return false;
    }
    if (!silent) {
      const token = state.push("html_inline", "", 0);
      token.content = match[0];
      if (isLinkOpen(token.content)) state.linkLevel++;
      if (isLinkClose(token.content)) state.linkLevel--;
    }
    state.pos += match[0].length;
    return true;
  }
  // Process html entity - &#123;, &#xAF;, &quot;, ...
    const DIGITAL_RE = /^&#((?:x[a-f0-9]{1,6}|[0-9]{1,7}));/i;
  const NAMED_RE = /^&([a-z][a-z0-9]{1,31});/i;
  function entity(state, silent) {
    const pos = state.pos;
    const max = state.posMax;
    if (state.src.charCodeAt(pos) !== 38 /* & */) return false;
    if (pos + 1 >= max) return false;
    const ch = state.src.charCodeAt(pos + 1);
    if (ch === 35 /* # */) {
      const match = state.src.slice(pos).match(DIGITAL_RE);
      if (match) {
        if (!silent) {
          const code = match[1][0].toLowerCase() === "x" ? parseInt(match[1].slice(1), 16) : parseInt(match[1], 10);
          const token = state.push("text_special", "", 0);
          token.content = isValidEntityCode(code) ? fromCodePoint(code) : fromCodePoint(65533);
          token.markup = match[0];
          token.info = "entity";
        }
        state.pos += match[0].length;
        return true;
      }
    } else {
      const match = state.src.slice(pos).match(NAMED_RE);
      if (match) {
        const decoded = decodeHTML(match[0]);
        if (decoded !== match[0]) {
          if (!silent) {
            const token = state.push("text_special", "", 0);
            token.content = decoded;
            token.markup = match[0];
            token.info = "entity";
          }
          state.pos += match[0].length;
          return true;
        }
      }
    }
    return false;
  }
  // For each opening emphasis-like marker find a matching closing one
  
    function processDelimiters(delimiters) {
    const openersBottom = {};
    const max = delimiters.length;
    if (!max) return;
    // headerIdx is the first delimiter of the current (where closer is) delimiter run
        let headerIdx = 0;
    let lastTokenIdx = -2;
 // needs any value lower than -1
        const jumps = [];
    for (let closerIdx = 0; closerIdx < max; closerIdx++) {
      const closer = delimiters[closerIdx];
      jumps.push(0);
      // markers belong to same delimiter run if:
      //  - they have adjacent tokens
      //  - AND markers are the same
      
            if (delimiters[headerIdx].marker !== closer.marker || lastTokenIdx !== closer.token - 1) {
        headerIdx = closerIdx;
      }
      lastTokenIdx = closer.token;
      // Length is only used for emphasis-specific "rule of 3",
      // if it's not defined (in strikethrough or 3rd party plugins),
      // we can default it to 0 to disable those checks.
      
            closer.length = closer.length || 0;
      if (!closer.close) continue;
      // Previously calculated lower bounds (previous fails)
      // for each marker, each delimiter length modulo 3,
      // and for whether this closer can be an opener;
      // https://github.com/commonmark/cmark/commit/34250e12ccebdc6372b8b49c44fab57c72443460
      /* eslint-disable-next-line no-prototype-builtins */      if (!openersBottom.hasOwnProperty(closer.marker)) {
        openersBottom[closer.marker] = [ -1, -1, -1, -1, -1, -1 ];
      }
      const minOpenerIdx = openersBottom[closer.marker][(closer.open ? 3 : 0) + closer.length % 3];
      let openerIdx = headerIdx - jumps[headerIdx] - 1;
      let newMinOpenerIdx = openerIdx;
      for (;openerIdx > minOpenerIdx; openerIdx -= jumps[openerIdx] + 1) {
        const opener = delimiters[openerIdx];
        if (opener.marker !== closer.marker) continue;
        if (opener.open && opener.end < 0) {
          let isOddMatch = false;
          // from spec:
          
          // If one of the delimiters can both open and close emphasis, then the
          // sum of the lengths of the delimiter runs containing the opening and
          // closing delimiters must not be a multiple of 3 unless both lengths
          // are multiples of 3.
          
                    if (opener.close || closer.open) {
            if ((opener.length + closer.length) % 3 === 0) {
              if (opener.length % 3 !== 0 || closer.length % 3 !== 0) {
                isOddMatch = true;
              }
            }
          }
          if (!isOddMatch) {
            // If previous delimiter cannot be an opener, we can safely skip
            // the entire sequence in future checks. This is required to make
            // sure algorithm has linear complexity (see *_*_*_*_*_... case).
            const lastJump = openerIdx > 0 && !delimiters[openerIdx - 1].open ? jumps[openerIdx - 1] + 1 : 0;
            jumps[closerIdx] = closerIdx - openerIdx + lastJump;
            jumps[openerIdx] = lastJump;
            closer.open = false;
            opener.end = closerIdx;
            opener.close = false;
            newMinOpenerIdx = -1;
            // treat next token as start of run,
            // it optimizes skips in **<...>**a**<...>** pathological case
                        lastTokenIdx = -2;
            break;
          }
        }
      }
      if (newMinOpenerIdx !== -1) {
        // If match for this delimiter run failed, we want to set lower bound for
        // future lookups. This is required to make sure algorithm has linear
        // complexity.
        // See details here:
        // https://github.com/commonmark/cmark/issues/178#issuecomment-270417442
        openersBottom[closer.marker][(closer.open ? 3 : 0) + (closer.length || 0) % 3] = newMinOpenerIdx;
      }
    }
  }
  function link_pairs(state) {
    const tokens_meta = state.tokens_meta;
    const max = state.tokens_meta.length;
    processDelimiters(state.delimiters);
    for (let curr = 0; curr < max; curr++) {
      if (tokens_meta[curr] && tokens_meta[curr].delimiters) {
        processDelimiters(tokens_meta[curr].delimiters);
      }
    }
  }
  // Clean up tokens after emphasis and strikethrough postprocessing:
  // merge adjacent text nodes into one and re-calculate all token levels
  
  // This is necessary because initially emphasis delimiter markers (*, _, ~)
  // are treated as their own separate text tokens. Then emphasis rule either
  // leaves them as text (needed to merge with adjacent text) or turns them
  // into opening/closing tags (which messes up levels inside).
  
    function fragments_join(state) {
    let curr, last;
    let level = 0;
    const tokens = state.tokens;
    const max = state.tokens.length;
    for (curr = last = 0; curr < max; curr++) {
      // re-calculate levels after emphasis/strikethrough turns some text nodes
      // into opening/closing tags
      if (tokens[curr].nesting < 0) level--;
 // closing tag
            tokens[curr].level = level;
      if (tokens[curr].nesting > 0) level++;
 // opening tag
            if (tokens[curr].type === "text" && curr + 1 < max && tokens[curr + 1].type === "text") {
        // collapse two adjacent text nodes
        tokens[curr + 1].content = tokens[curr].content + tokens[curr + 1].content;
      } else {
        if (curr !== last) {
          tokens[last] = tokens[curr];
        }
        last++;
      }
    }
    if (curr !== last) {
      tokens.length = last;
    }
  }
  /** internal
   * class ParserInline
   *
   * Tokenizes paragraph content.
   **/
  // Parser rules
    const _rules = [ [ "text", text ], [ "linkify", linkify ], [ "newline", newline ], [ "escape", escape ], [ "backticks", backtick ], [ "strikethrough", r_strikethrough.tokenize ], [ "emphasis", r_emphasis.tokenize ], [ "link", link ], [ "image", image ], [ "autolink", autolink ], [ "html_inline", html_inline ], [ "entity", entity ] ];
  // `rule2` ruleset was created specifically for emphasis/strikethrough
  // post-processing and may be changed in the future.
  
  // Don't use this for anything except pairs (plugins working with `balance_pairs`).
  
    const _rules2 = [ [ "balance_pairs", link_pairs ], [ "strikethrough", r_strikethrough.postProcess ], [ "emphasis", r_emphasis.postProcess ], 
  // rules for pairs separate '**' into its own text tokens, which may be left unused,
  // rule below merges unused segments back with the rest of the text
  [ "fragments_join", fragments_join ] ];
  /**
   * new ParserInline()
   **/  function ParserInline() {
    /**
     * ParserInline#ruler -> Ruler
     *
     * [[Ruler]] instance. Keep configuration of inline rules.
     **/
    this.ruler = new Ruler;
    for (let i = 0; i < _rules.length; i++) {
      this.ruler.push(_rules[i][0], _rules[i][1]);
    }
    /**
     * ParserInline#ruler2 -> Ruler
     *
     * [[Ruler]] instance. Second ruler used for post-processing
     * (e.g. in emphasis-like rules).
     **/    this.ruler2 = new Ruler;
    for (let i = 0; i < _rules2.length; i++) {
      this.ruler2.push(_rules2[i][0], _rules2[i][1]);
    }
  }
  // Skip single token by running all rules in validation mode;
  // returns `true` if any rule reported success
  
    ParserInline.prototype.skipToken = function(state) {
    const pos = state.pos;
    const rules = this.ruler.getRules("");
    const len = rules.length;
    const maxNesting = state.md.options.maxNesting;
    const cache = state.cache;
    if (typeof cache[pos] !== "undefined") {
      state.pos = cache[pos];
      return;
    }
    let ok = false;
    if (state.level < maxNesting) {
      for (let i = 0; i < len; i++) {
        // Increment state.level and decrement it later to limit recursion.
        // It's harmless to do here, because no tokens are created. But ideally,
        // we'd need a separate private state variable for this purpose.
        state.level++;
        ok = rules[i](state, true);
        state.level--;
        if (ok) {
          if (pos >= state.pos) {
            throw new Error("inline rule didn't increment state.pos");
          }
          break;
        }
      }
    } else {
      // Too much nesting, just skip until the end of the paragraph.
      // NOTE: this will cause links to behave incorrectly in the following case,
      //       when an amount of `[` is exactly equal to `maxNesting + 1`:
      //       [[[[[[[[[[[[[[[[[[[[[foo]()
      // TODO: remove this workaround when CM standard will allow nested links
      //       (we can replace it by preventing links from being parsed in
      //       validation mode)
      state.pos = state.posMax;
    }
    if (!ok) {
      state.pos++;
    }
    cache[pos] = state.pos;
  };
  // Generate tokens for input range
  
    ParserInline.prototype.tokenize = function(state) {
    const rules = this.ruler.getRules("");
    const len = rules.length;
    const end = state.posMax;
    const maxNesting = state.md.options.maxNesting;
    while (state.pos < end) {
      // Try all possible rules.
      // On success, rule should:
      // - update `state.pos`
      // - update `state.tokens`
      // - return true
      const prevPos = state.pos;
      let ok = false;
      if (state.level < maxNesting) {
        for (let i = 0; i < len; i++) {
          ok = rules[i](state, false);
          if (ok) {
            if (prevPos >= state.pos) {
              throw new Error("inline rule didn't increment state.pos");
            }
            break;
          }
        }
      }
      if (ok) {
        if (state.pos >= end) {
          break;
        }
        continue;
      }
      state.pending += state.src[state.pos++];
    }
    if (state.pending) {
      state.pushPending();
    }
  };
  /**
   * ParserInline.parse(str, md, env, outTokens)
   *
   * Process input string and push inline tokens into `outTokens`
   **/  ParserInline.prototype.parse = function(str, md, env, outTokens) {
    const state = new this.State(str, md, env, outTokens);
    this.tokenize(state);
    const rules = this.ruler2.getRules("");
    const len = rules.length;
    for (let i = 0; i < len; i++) {
      rules[i](state);
    }
  };
  ParserInline.prototype.State = StateInline;
  function reFactory(opts) {
    const re = {};
    opts = opts || {};
    re.src_Any = Any.source;
    re.src_Cc = Cc.source;
    re.src_Z = Z.source;
    re.src_P = P.source;
    // \p{\Z\P\Cc\CF} (white spaces + control + format + punctuation)
        re.src_ZPCc = [ re.src_Z, re.src_P, re.src_Cc ].join("|");
    // \p{\Z\Cc} (white spaces + control)
        re.src_ZCc = [ re.src_Z, re.src_Cc ].join("|");
    // Experimental. List of chars, completely prohibited in links
    // because can separate it from other part of text
        const text_separators = "[><\uff5c]";
    // All possible word characters (everything without punctuation, spaces & controls)
    // Defined via punctuation & spaces to save space
    // Should be something like \p{\L\N\S\M} (\w but without `_`)
        re.src_pseudo_letter = "(?:(?!" + text_separators + "|" + re.src_ZPCc + ")" + re.src_Any + ")";
    // The same as abothe but without [0-9]
    // var src_pseudo_letter_non_d = '(?:(?![0-9]|' + src_ZPCc + ')' + src_Any + ')';
        re.src_ip4 = "(?:(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\\.){3}(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)";
    // Prohibit any of "@/[]()" in user/pass to avoid wrong domain fetch.
        re.src_auth = "(?:(?:(?!" + re.src_ZCc + "|[@/\\[\\]()]).)+@)?";
    re.src_port = "(?::(?:6(?:[0-4]\\d{3}|5(?:[0-4]\\d{2}|5(?:[0-2]\\d|3[0-5])))|[1-5]?\\d{1,4}))?";
    re.src_host_terminator = "(?=$|" + text_separators + "|" + re.src_ZPCc + ")" + "(?!" + (opts["---"] ? "-(?!--)|" : "-|") + "_|:\\d|\\.-|\\.(?!$|" + re.src_ZPCc + "))";
    re.src_path = "(?:" + "[/?#]" + "(?:" + "(?!" + re.src_ZCc + "|" + text_separators + "|[()[\\]{}.,\"'?!\\-;]).|" + "\\[(?:(?!" + re.src_ZCc + "|\\]).)*\\]|" + "\\((?:(?!" + re.src_ZCc + "|[)]).)*\\)|" + "\\{(?:(?!" + re.src_ZCc + "|[}]).)*\\}|" + '\\"(?:(?!' + re.src_ZCc + '|["]).)+\\"|' + "\\'(?:(?!" + re.src_ZCc + "|[']).)+\\'|" + 
    // allow `I'm_king` if no pair found
    "\\'(?=" + re.src_pseudo_letter + "|[-])|" + 
    // google has many dots in "google search" links (#66, #81).
    // github has ... in commit range links,
    // Restrict to
    // - english
    // - percent-encoded
    // - parts of file path
    // - params separator
    // until more examples found.
    "\\.{2,}[a-zA-Z0-9%/&]|" + "\\.(?!" + re.src_ZCc + "|[.]|$)|" + (opts["---"] ? "\\-(?!--(?:[^-]|$))(?:-*)|" : "\\-+|") + 
    // allow `,,,` in paths
    ",(?!" + re.src_ZCc + "|$)|" + 
    // allow `;` if not followed by space-like char
    ";(?!" + re.src_ZCc + "|$)|" + 
    // allow `!!!` in paths, but not at the end
    "\\!+(?!" + re.src_ZCc + "|[!]|$)|" + "\\?(?!" + re.src_ZCc + "|[?]|$)" + ")+" + "|\\/" + ")?";
    // Allow anything in markdown spec, forbid quote (") at the first position
    // because emails enclosed in quotes are far more common
        re.src_email_name = '[\\-;:&=\\+\\$,\\.a-zA-Z0-9_][\\-;:&=\\+\\$,\\"\\.a-zA-Z0-9_]*';
    re.src_xn = "xn--[a-z0-9\\-]{1,59}";
    // More to read about domain names
    // http://serverfault.com/questions/638260/
        re.src_domain_root = 
    // Allow letters & digits (http://test1)
    "(?:" + re.src_xn + "|" + re.src_pseudo_letter + "{1,63}" + ")";
    re.src_domain = "(?:" + re.src_xn + "|" + "(?:" + re.src_pseudo_letter + ")" + "|" + "(?:" + re.src_pseudo_letter + "(?:-|" + re.src_pseudo_letter + "){0,61}" + re.src_pseudo_letter + ")" + ")";
    re.src_host = "(?:" + 
    // Don't need IP check, because digits are already allowed in normal domain names
    //   src_ip4 +
    // '|' +
    "(?:(?:(?:" + re.src_domain + ")\\.)*" + re.src_domain /* _root */ + ")" + ")";
    re.tpl_host_fuzzy = "(?:" + re.src_ip4 + "|" + "(?:(?:(?:" + re.src_domain + ")\\.)+(?:%TLDS%))" + ")";
    re.tpl_host_no_ip_fuzzy = "(?:(?:(?:" + re.src_domain + ")\\.)+(?:%TLDS%))";
    re.src_host_strict = re.src_host + re.src_host_terminator;
    re.tpl_host_fuzzy_strict = re.tpl_host_fuzzy + re.src_host_terminator;
    re.src_host_port_strict = re.src_host + re.src_port + re.src_host_terminator;
    re.tpl_host_port_fuzzy_strict = re.tpl_host_fuzzy + re.src_port + re.src_host_terminator;
    re.tpl_host_port_no_ip_fuzzy_strict = re.tpl_host_no_ip_fuzzy + re.src_port + re.src_host_terminator;
    
    // Main rules
    
    // Rude test fuzzy links by host, for quick deny
        re.tpl_host_fuzzy_test = "localhost|www\\.|\\.\\d{1,3}\\.|(?:\\.(?:%TLDS%)(?:" + re.src_ZPCc + "|>|$))";
    re.tpl_email_fuzzy = "(^|" + text_separators + '|"|\\(|' + re.src_ZCc + ")" + "(" + re.src_email_name + "@" + re.tpl_host_fuzzy_strict + ")";
    re.tpl_link_fuzzy = 
    // Fuzzy link can't be prepended with .:/\- and non punctuation.
    // but can start with > (markdown blockquote)
    "(^|(?![.:/\\-_@])(?:[$+<=>^`|\uff5c]|" + re.src_ZPCc + "))" + "((?![$+<=>^`|\uff5c])" + re.tpl_host_port_fuzzy_strict + re.src_path + ")";
    re.tpl_link_no_ip_fuzzy = 
    // Fuzzy link can't be prepended with .:/\- and non punctuation.
    // but can start with > (markdown blockquote)
    "(^|(?![.:/\\-_@])(?:[$+<=>^`|\uff5c]|" + re.src_ZPCc + "))" + "((?![$+<=>^`|\uff5c])" + re.tpl_host_port_no_ip_fuzzy_strict + re.src_path + ")";
    return re;
  }
  
  // Helpers
  
  // Merge objects
  
    function assign(obj /* from1, from2, from3, ... */) {
    const sources = Array.prototype.slice.call(arguments, 1);
    sources.forEach((function(source) {
      if (!source) {
        return;
      }
      Object.keys(source).forEach((function(key) {
        obj[key] = source[key];
      }));
    }));
    return obj;
  }
  function _class(obj) {
    return Object.prototype.toString.call(obj);
  }
  function isString(obj) {
    return _class(obj) === "[object String]";
  }
  function isObject(obj) {
    return _class(obj) === "[object Object]";
  }
  function isRegExp(obj) {
    return _class(obj) === "[object RegExp]";
  }
  function isFunction(obj) {
    return _class(obj) === "[object Function]";
  }
  function escapeRE(str) {
    return str.replace(/[.?*+^$[\]\\(){}|-]/g, "\\$&");
  }
  
    const defaultOptions = {
    fuzzyLink: true,
    fuzzyEmail: true,
    fuzzyIP: false
  };
  function isOptionsObj(obj) {
    return Object.keys(obj || {}).reduce((function(acc, k) {
      /* eslint-disable-next-line no-prototype-builtins */
      return acc || defaultOptions.hasOwnProperty(k);
    }), false);
  }
  const defaultSchemas = {
    "http:": {
      validate: function(text, pos, self) {
        const tail = text.slice(pos);
        if (!self.re.http) {
          // compile lazily, because "host"-containing variables can change on tlds update.
          self.re.http = new RegExp("^\\/\\/" + self.re.src_auth + self.re.src_host_port_strict + self.re.src_path, "i");
        }
        if (self.re.http.test(tail)) {
          return tail.match(self.re.http)[0].length;
        }
        return 0;
      }
    },
    "https:": "http:",
    "ftp:": "http:",
    "//": {
      validate: function(text, pos, self) {
        const tail = text.slice(pos);
        if (!self.re.no_http) {
          // compile lazily, because "host"-containing variables can change on tlds update.
          self.re.no_http = new RegExp("^" + self.re.src_auth + 
          // Don't allow single-level domains, because of false positives like '//test'
          // with code comments
          "(?:localhost|(?:(?:" + self.re.src_domain + ")\\.)+" + self.re.src_domain_root + ")" + self.re.src_port + self.re.src_host_terminator + self.re.src_path, "i");
        }
        if (self.re.no_http.test(tail)) {
          // should not be `://` & `///`, that protects from errors in protocol name
          if (pos >= 3 && text[pos - 3] === ":") {
            return 0;
          }
          if (pos >= 3 && text[pos - 3] === "/") {
            return 0;
          }
          return tail.match(self.re.no_http)[0].length;
        }
        return 0;
      }
    },
    "mailto:": {
      validate: function(text, pos, self) {
        const tail = text.slice(pos);
        if (!self.re.mailto) {
          self.re.mailto = new RegExp("^" + self.re.src_email_name + "@" + self.re.src_host_strict, "i");
        }
        if (self.re.mailto.test(tail)) {
          return tail.match(self.re.mailto)[0].length;
        }
        return 0;
      }
    }
  };
  // RE pattern for 2-character tlds (autogenerated by ./support/tlds_2char_gen.js)
  /* eslint-disable-next-line max-len */  const tlds_2ch_src_re = "a[cdefgilmnoqrstuwxz]|b[abdefghijmnorstvwyz]|c[acdfghiklmnoruvwxyz]|d[ejkmoz]|e[cegrstu]|f[ijkmor]|g[abdefghilmnpqrstuwy]|h[kmnrtu]|i[delmnoqrst]|j[emop]|k[eghimnprwyz]|l[abcikrstuvy]|m[acdeghklmnopqrstuvwxyz]|n[acefgilopruz]|om|p[aefghklmnrstwy]|qa|r[eosuw]|s[abcdeghijklmnortuvxyz]|t[cdfghjklmnortvwz]|u[agksyz]|v[aceginu]|w[fs]|y[et]|z[amw]";
  // DON'T try to make PRs with changes. Extend TLDs with LinkifyIt.tlds() instead
    const tlds_default = "biz|com|edu|gov|net|org|pro|web|xxx|aero|asia|coop|info|museum|name|shop|\u0440\u0444".split("|");
  function resetScanCache(self) {
    self.__index__ = -1;
    self.__text_cache__ = "";
  }
  function createValidator(re) {
    return function(text, pos) {
      const tail = text.slice(pos);
      if (re.test(tail)) {
        return tail.match(re)[0].length;
      }
      return 0;
    };
  }
  function createNormalizer() {
    return function(match, self) {
      self.normalize(match);
    };
  }
  // Schemas compiler. Build regexps.
  
    function compile(self) {
    // Load & clone RE patterns.
    const re = self.re = reFactory(self.__opts__);
    // Define dynamic patterns
        const tlds = self.__tlds__.slice();
    self.onCompile();
    if (!self.__tlds_replaced__) {
      tlds.push(tlds_2ch_src_re);
    }
    tlds.push(re.src_xn);
    re.src_tlds = tlds.join("|");
    function untpl(tpl) {
      return tpl.replace("%TLDS%", re.src_tlds);
    }
    re.email_fuzzy = RegExp(untpl(re.tpl_email_fuzzy), "i");
    re.link_fuzzy = RegExp(untpl(re.tpl_link_fuzzy), "i");
    re.link_no_ip_fuzzy = RegExp(untpl(re.tpl_link_no_ip_fuzzy), "i");
    re.host_fuzzy_test = RegExp(untpl(re.tpl_host_fuzzy_test), "i");
    
    // Compile each schema
    
        const aliases = [];
    self.__compiled__ = {};
 // Reset compiled data
        function schemaError(name, val) {
      throw new Error('(LinkifyIt) Invalid schema "' + name + '": ' + val);
    }
    Object.keys(self.__schemas__).forEach((function(name) {
      const val = self.__schemas__[name];
      // skip disabled methods
            if (val === null) {
        return;
      }
      const compiled = {
        validate: null,
        link: null
      };
      self.__compiled__[name] = compiled;
      if (isObject(val)) {
        if (isRegExp(val.validate)) {
          compiled.validate = createValidator(val.validate);
        } else if (isFunction(val.validate)) {
          compiled.validate = val.validate;
        } else {
          schemaError(name, val);
        }
        if (isFunction(val.normalize)) {
          compiled.normalize = val.normalize;
        } else if (!val.normalize) {
          compiled.normalize = createNormalizer();
        } else {
          schemaError(name, val);
        }
        return;
      }
      if (isString(val)) {
        aliases.push(name);
        return;
      }
      schemaError(name, val);
    }));
    
    // Compile postponed aliases
    
        aliases.forEach((function(alias) {
      if (!self.__compiled__[self.__schemas__[alias]]) {
        // Silently fail on missed schemas to avoid errons on disable.
        // schemaError(alias, self.__schemas__[alias]);
        return;
      }
      self.__compiled__[alias].validate = self.__compiled__[self.__schemas__[alias]].validate;
      self.__compiled__[alias].normalize = self.__compiled__[self.__schemas__[alias]].normalize;
    }));
    
    // Fake record for guessed links
    
        self.__compiled__[""] = {
      validate: null,
      normalize: createNormalizer()
    };
    
    // Build schema condition
    
        const slist = Object.keys(self.__compiled__).filter((function(name) {
      // Filter disabled & fake schemas
      return name.length > 0 && self.__compiled__[name];
    })).map(escapeRE).join("|");
    // (?!_) cause 1.5x slowdown
        self.re.schema_test = RegExp("(^|(?!_)(?:[><\uff5c]|" + re.src_ZPCc + "))(" + slist + ")", "i");
    self.re.schema_search = RegExp("(^|(?!_)(?:[><\uff5c]|" + re.src_ZPCc + "))(" + slist + ")", "ig");
    self.re.schema_at_start = RegExp("^" + self.re.schema_search.source, "i");
    self.re.pretest = RegExp("(" + self.re.schema_test.source + ")|(" + self.re.host_fuzzy_test.source + ")|@", "i");
    
    // Cleanup
    
        resetScanCache(self);
  }
  /**
   * class Match
   *
   * Match result. Single element of array, returned by [[LinkifyIt#match]]
   **/  function Match(self, shift) {
    const start = self.__index__;
    const end = self.__last_index__;
    const text = self.__text_cache__.slice(start, end);
    /**
     * Match#schema -> String
     *
     * Prefix (protocol) for matched string.
     **/    this.schema = self.__schema__.toLowerCase();
    /**
     * Match#index -> Number
     *
     * First position of matched string.
     **/    this.index = start + shift;
    /**
     * Match#lastIndex -> Number
     *
     * Next position after matched string.
     **/    this.lastIndex = end + shift;
    /**
     * Match#raw -> String
     *
     * Matched string.
     **/    this.raw = text;
    /**
     * Match#text -> String
     *
     * Notmalized text of matched string.
     **/    this.text = text;
    /**
     * Match#url -> String
     *
     * Normalized url of matched string.
     **/    this.url = text;
  }
  function createMatch(self, shift) {
    const match = new Match(self, shift);
    self.__compiled__[match.schema].normalize(match, self);
    return match;
  }
  /**
   * class LinkifyIt
   **/
  /**
   * new LinkifyIt(schemas, options)
   * - schemas (Object): Optional. Additional schemas to validate (prefix/validator)
   * - options (Object): { fuzzyLink|fuzzyEmail|fuzzyIP: true|false }
   *
   * Creates new linkifier instance with optional additional schemas.
   * Can be called without `new` keyword for convenience.
   *
   * By default understands:
   *
   * - `http(s)://...` , `ftp://...`, `mailto:...` & `//...` links
   * - "fuzzy" links and emails (example.com, foo@bar.com).
   *
   * `schemas` is an object, where each key/value describes protocol/rule:
   *
   * - __key__ - link prefix (usually, protocol name with `:` at the end, `skype:`
   *   for example). `linkify-it` makes shure that prefix is not preceeded with
   *   alphanumeric char and symbols. Only whitespaces and punctuation allowed.
   * - __value__ - rule to check tail after link prefix
   *   - _String_ - just alias to existing rule
   *   - _Object_
   *     - _validate_ - validator function (should return matched length on success),
   *       or `RegExp`.
   *     - _normalize_ - optional function to normalize text & url of matched result
   *       (for example, for @twitter mentions).
   *
   * `options`:
   *
   * - __fuzzyLink__ - recognige URL-s without `http(s):` prefix. Default `true`.
   * - __fuzzyIP__ - allow IPs in fuzzy links above. Can conflict with some texts
   *   like version numbers. Default `false`.
   * - __fuzzyEmail__ - recognize emails without `mailto:` prefix.
   *
   **/  function LinkifyIt(schemas, options) {
    if (!(this instanceof LinkifyIt)) {
      return new LinkifyIt(schemas, options);
    }
    if (!options) {
      if (isOptionsObj(schemas)) {
        options = schemas;
        schemas = {};
      }
    }
    this.__opts__ = assign({}, defaultOptions, options);
    // Cache last tested result. Used to skip repeating steps on next `match` call.
        this.__index__ = -1;
    this.__last_index__ = -1;
 // Next scan position
        this.__schema__ = "";
    this.__text_cache__ = "";
    this.__schemas__ = assign({}, defaultSchemas, schemas);
    this.__compiled__ = {};
    this.__tlds__ = tlds_default;
    this.__tlds_replaced__ = false;
    this.re = {};
    compile(this);
  }
  /** chainable
   * LinkifyIt#add(schema, definition)
   * - schema (String): rule name (fixed pattern prefix)
   * - definition (String|RegExp|Object): schema definition
   *
   * Add new rule definition. See constructor description for details.
   **/  LinkifyIt.prototype.add = function add(schema, definition) {
    this.__schemas__[schema] = definition;
    compile(this);
    return this;
  };
  /** chainable
   * LinkifyIt#set(options)
   * - options (Object): { fuzzyLink|fuzzyEmail|fuzzyIP: true|false }
   *
   * Set recognition options for links without schema.
   **/  LinkifyIt.prototype.set = function set(options) {
    this.__opts__ = assign(this.__opts__, options);
    return this;
  };
  /**
   * LinkifyIt#test(text) -> Boolean
   *
   * Searches linkifiable pattern and returns `true` on success or `false` on fail.
   **/  LinkifyIt.prototype.test = function test(text) {
    // Reset scan cache
    this.__text_cache__ = text;
    this.__index__ = -1;
    if (!text.length) {
      return false;
    }
    let m, ml, me, len, shift, next, re, tld_pos, at_pos;
    // try to scan for link with schema - that's the most simple rule
        if (this.re.schema_test.test(text)) {
      re = this.re.schema_search;
      re.lastIndex = 0;
      while ((m = re.exec(text)) !== null) {
        len = this.testSchemaAt(text, m[2], re.lastIndex);
        if (len) {
          this.__schema__ = m[2];
          this.__index__ = m.index + m[1].length;
          this.__last_index__ = m.index + m[0].length + len;
          break;
        }
      }
    }
    if (this.__opts__.fuzzyLink && this.__compiled__["http:"]) {
      // guess schemaless links
      tld_pos = text.search(this.re.host_fuzzy_test);
      if (tld_pos >= 0) {
        // if tld is located after found link - no need to check fuzzy pattern
        if (this.__index__ < 0 || tld_pos < this.__index__) {
          if ((ml = text.match(this.__opts__.fuzzyIP ? this.re.link_fuzzy : this.re.link_no_ip_fuzzy)) !== null) {
            shift = ml.index + ml[1].length;
            if (this.__index__ < 0 || shift < this.__index__) {
              this.__schema__ = "";
              this.__index__ = shift;
              this.__last_index__ = ml.index + ml[0].length;
            }
          }
        }
      }
    }
    if (this.__opts__.fuzzyEmail && this.__compiled__["mailto:"]) {
      // guess schemaless emails
      at_pos = text.indexOf("@");
      if (at_pos >= 0) {
        // We can't skip this check, because this cases are possible:
        // 192.168.1.1@gmail.com, my.in@example.com
        if ((me = text.match(this.re.email_fuzzy)) !== null) {
          shift = me.index + me[1].length;
          next = me.index + me[0].length;
          if (this.__index__ < 0 || shift < this.__index__ || shift === this.__index__ && next > this.__last_index__) {
            this.__schema__ = "mailto:";
            this.__index__ = shift;
            this.__last_index__ = next;
          }
        }
      }
    }
    return this.__index__ >= 0;
  };
  /**
   * LinkifyIt#pretest(text) -> Boolean
   *
   * Very quick check, that can give false positives. Returns true if link MAY BE
   * can exists. Can be used for speed optimization, when you need to check that
   * link NOT exists.
   **/  LinkifyIt.prototype.pretest = function pretest(text) {
    return this.re.pretest.test(text);
  };
  /**
   * LinkifyIt#testSchemaAt(text, name, position) -> Number
   * - text (String): text to scan
   * - name (String): rule (schema) name
   * - position (Number): text offset to check from
   *
   * Similar to [[LinkifyIt#test]] but checks only specific protocol tail exactly
   * at given position. Returns length of found pattern (0 on fail).
   **/  LinkifyIt.prototype.testSchemaAt = function testSchemaAt(text, schema, pos) {
    // If not supported schema check requested - terminate
    if (!this.__compiled__[schema.toLowerCase()]) {
      return 0;
    }
    return this.__compiled__[schema.toLowerCase()].validate(text, pos, this);
  };
  /**
   * LinkifyIt#match(text) -> Array|null
   *
   * Returns array of found link descriptions or `null` on fail. We strongly
   * recommend to use [[LinkifyIt#test]] first, for best speed.
   *
   * ##### Result match description
   *
   * - __schema__ - link schema, can be empty for fuzzy links, or `//` for
   *   protocol-neutral  links.
   * - __index__ - offset of matched text
   * - __lastIndex__ - index of next char after mathch end
   * - __raw__ - matched text
   * - __text__ - normalized text
   * - __url__ - link, generated from matched text
   **/  LinkifyIt.prototype.match = function match(text) {
    const result = [];
    let shift = 0;
    // Try to take previous element from cache, if .test() called before
        if (this.__index__ >= 0 && this.__text_cache__ === text) {
      result.push(createMatch(this, shift));
      shift = this.__last_index__;
    }
    // Cut head if cache was used
        let tail = shift ? text.slice(shift) : text;
    // Scan string until end reached
        while (this.test(tail)) {
      result.push(createMatch(this, shift));
      tail = tail.slice(this.__last_index__);
      shift += this.__last_index__;
    }
    if (result.length) {
      return result;
    }
    return null;
  };
  /**
   * LinkifyIt#matchAtStart(text) -> Match|null
   *
   * Returns fully-formed (not fuzzy) link if it starts at the beginning
   * of the string, and null otherwise.
   **/  LinkifyIt.prototype.matchAtStart = function matchAtStart(text) {
    // Reset scan cache
    this.__text_cache__ = text;
    this.__index__ = -1;
    if (!text.length) return null;
    const m = this.re.schema_at_start.exec(text);
    if (!m) return null;
    const len = this.testSchemaAt(text, m[2], m[0].length);
    if (!len) return null;
    this.__schema__ = m[2];
    this.__index__ = m.index + m[1].length;
    this.__last_index__ = m.index + m[0].length + len;
    return createMatch(this, 0);
  };
  /** chainable
   * LinkifyIt#tlds(list [, keepOld]) -> this
   * - list (Array): list of tlds
   * - keepOld (Boolean): merge with current list if `true` (`false` by default)
   *
   * Load (or merge) new tlds list. Those are user for fuzzy links (without prefix)
   * to avoid false positives. By default this algorythm used:
   *
   * - hostname with any 2-letter root zones are ok.
   * - biz|com|edu|gov|net|org|pro|web|xxx|aero|asia|coop|info|museum|name|shop|рф
   *   are ok.
   * - encoded (`xn--...`) root zones are ok.
   *
   * If list is replaced, then exact match for 2-chars root zones will be checked.
   **/  LinkifyIt.prototype.tlds = function tlds(list, keepOld) {
    list = Array.isArray(list) ? list : [ list ];
    if (!keepOld) {
      this.__tlds__ = list.slice();
      this.__tlds_replaced__ = true;
      compile(this);
      return this;
    }
    this.__tlds__ = this.__tlds__.concat(list).sort().filter((function(el, idx, arr) {
      return el !== arr[idx - 1];
    })).reverse();
    compile(this);
    return this;
  };
  /**
   * LinkifyIt#normalize(match)
   *
   * Default normalizer (if schema does not define it's own).
   **/  LinkifyIt.prototype.normalize = function normalize(match) {
    // Do minimal possible changes by default. Need to collect feedback prior
    // to move forward https://github.com/markdown-it/linkify-it/issues/1
    if (!match.schema) {
      match.url = "http://" + match.url;
    }
    if (match.schema === "mailto:" && !/^mailto:/i.test(match.url)) {
      match.url = "mailto:" + match.url;
    }
  };
  /**
   * LinkifyIt#onCompile()
   *
   * Override to modify basic RegExp-s.
   **/  LinkifyIt.prototype.onCompile = function onCompile() {};
  /** Highest positive signed 32-bit float value */  const maxInt = 2147483647;
 // aka. 0x7FFFFFFF or 2^31-1
  /** Bootstring parameters */  const base = 36;
  const tMin = 1;
  const tMax = 26;
  const skew = 38;
  const damp = 700;
  const initialBias = 72;
  const initialN = 128;
 // 0x80
    const delimiter = "-";
 // '\x2D'
  /** Regular expressions */  const regexPunycode = /^xn--/;
  const regexNonASCII = /[^\0-\x7F]/;
 // Note: U+007F DEL is excluded too.
    const regexSeparators = /[\x2E\u3002\uFF0E\uFF61]/g;
 // RFC 3490 separators
  /** Error messages */  const errors = {
    overflow: "Overflow: input needs wider integers to process",
    "not-basic": "Illegal input >= 0x80 (not a basic code point)",
    "invalid-input": "Invalid input"
  };
  /** Convenience shortcuts */  const baseMinusTMin = base - tMin;
  const floor = Math.floor;
  const stringFromCharCode = String.fromCharCode;
  /*--------------------------------------------------------------------------*/
  /**
   * A generic error utility function.
   * @private
   * @param {String} type The error type.
   * @returns {Error} Throws a `RangeError` with the applicable error message.
   */  function error(type) {
    throw new RangeError(errors[type]);
  }
  /**
   * A generic `Array#map` utility function.
   * @private
   * @param {Array} array The array to iterate over.
   * @param {Function} callback The function that gets called for every array
   * item.
   * @returns {Array} A new array of values returned by the callback function.
   */  function map(array, callback) {
    const result = [];
    let length = array.length;
    while (length--) {
      result[length] = callback(array[length]);
    }
    return result;
  }
  /**
   * A simple `Array#map`-like wrapper to work with domain name strings or email
   * addresses.
   * @private
   * @param {String} domain The domain name or email address.
   * @param {Function} callback The function that gets called for every
   * character.
   * @returns {String} A new string of characters returned by the callback
   * function.
   */  function mapDomain(domain, callback) {
    const parts = domain.split("@");
    let result = "";
    if (parts.length > 1) {
      // In email addresses, only the domain name should be punycoded. Leave
      // the local part (i.e. everything up to `@`) intact.
      result = parts[0] + "@";
      domain = parts[1];
    }
    // Avoid `split(regex)` for IE8 compatibility. See #17.
        domain = domain.replace(regexSeparators, ".");
    const labels = domain.split(".");
    const encoded = map(labels, callback).join(".");
    return result + encoded;
  }
  /**
   * Creates an array containing the numeric code points of each Unicode
   * character in the string. While JavaScript uses UCS-2 internally,
   * this function will convert a pair of surrogate halves (each of which
   * UCS-2 exposes as separate characters) into a single code point,
   * matching UTF-16.
   * @see `punycode.ucs2.encode`
   * @see <https://mathiasbynens.be/notes/javascript-encoding>
   * @memberOf punycode.ucs2
   * @name decode
   * @param {String} string The Unicode input string (UCS-2).
   * @returns {Array} The new array of code points.
   */  function ucs2decode(string) {
    const output = [];
    let counter = 0;
    const length = string.length;
    while (counter < length) {
      const value = string.charCodeAt(counter++);
      if (value >= 55296 && value <= 56319 && counter < length) {
        // It's a high surrogate, and there is a next character.
        const extra = string.charCodeAt(counter++);
        if ((extra & 64512) == 56320) {
          // Low surrogate.
          output.push(((value & 1023) << 10) + (extra & 1023) + 65536);
        } else {
          // It's an unmatched surrogate; only append this code unit, in case the
          // next code unit is the high surrogate of a surrogate pair.
          output.push(value);
          counter--;
        }
      } else {
        output.push(value);
      }
    }
    return output;
  }
  /**
   * Creates a string based on an array of numeric code points.
   * @see `punycode.ucs2.decode`
   * @memberOf punycode.ucs2
   * @name encode
   * @param {Array} codePoints The array of numeric code points.
   * @returns {String} The new Unicode string (UCS-2).
   */  const ucs2encode = codePoints => String.fromCodePoint(...codePoints)
  /**
   * Converts a basic code point into a digit/integer.
   * @see `digitToBasic()`
   * @private
   * @param {Number} codePoint The basic numeric code point value.
   * @returns {Number} The numeric value of a basic code point (for use in
   * representing integers) in the range `0` to `base - 1`, or `base` if
   * the code point does not represent a value.
   */;
  const basicToDigit = function(codePoint) {
    if (codePoint >= 48 && codePoint < 58) {
      return 26 + (codePoint - 48);
    }
    if (codePoint >= 65 && codePoint < 91) {
      return codePoint - 65;
    }
    if (codePoint >= 97 && codePoint < 123) {
      return codePoint - 97;
    }
    return base;
  };
  /**
   * Converts a digit/integer into a basic code point.
   * @see `basicToDigit()`
   * @private
   * @param {Number} digit The numeric value of a basic code point.
   * @returns {Number} The basic code point whose value (when used for
   * representing integers) is `digit`, which needs to be in the range
   * `0` to `base - 1`. If `flag` is non-zero, the uppercase form is
   * used; else, the lowercase form is used. The behavior is undefined
   * if `flag` is non-zero and `digit` has no uppercase form.
   */  const digitToBasic = function(digit, flag) {
    //  0..25 map to ASCII a..z or A..Z
    // 26..35 map to ASCII 0..9
    return digit + 22 + 75 * (digit < 26) - ((flag != 0) << 5);
  };
  /**
   * Bias adaptation function as per section 3.4 of RFC 3492.
   * https://tools.ietf.org/html/rfc3492#section-3.4
   * @private
   */  const adapt = function(delta, numPoints, firstTime) {
    let k = 0;
    delta = firstTime ? floor(delta / damp) : delta >> 1;
    delta += floor(delta / numPoints);
    for (;delta > baseMinusTMin * tMax >> 1; k += base) {
      delta = floor(delta / baseMinusTMin);
    }
    return floor(k + (baseMinusTMin + 1) * delta / (delta + skew));
  };
  /**
   * Converts a Punycode string of ASCII-only symbols to a string of Unicode
   * symbols.
   * @memberOf punycode
   * @param {String} input The Punycode string of ASCII-only symbols.
   * @returns {String} The resulting string of Unicode symbols.
   */  const decode = function(input) {
    // Don't use UCS-2.
    const output = [];
    const inputLength = input.length;
    let i = 0;
    let n = initialN;
    let bias = initialBias;
    // Handle the basic code points: let `basic` be the number of input code
    // points before the last delimiter, or `0` if there is none, then copy
    // the first basic code points to the output.
        let basic = input.lastIndexOf(delimiter);
    if (basic < 0) {
      basic = 0;
    }
    for (let j = 0; j < basic; ++j) {
      // if it's not a basic code point
      if (input.charCodeAt(j) >= 128) {
        error("not-basic");
      }
      output.push(input.charCodeAt(j));
    }
    // Main decoding loop: start just after the last delimiter if any basic code
    // points were copied; start at the beginning otherwise.
        for (let index = basic > 0 ? basic + 1 : 0; index < inputLength; ) {
      // `index` is the index of the next character to be consumed.
      // Decode a generalized variable-length integer into `delta`,
      // which gets added to `i`. The overflow checking is easier
      // if we increase `i` as we go, then subtract off its starting
      // value at the end to obtain `delta`.
      const oldi = i;
      for (let w = 1, k = base; ;k += base) {
        if (index >= inputLength) {
          error("invalid-input");
        }
        const digit = basicToDigit(input.charCodeAt(index++));
        if (digit >= base) {
          error("invalid-input");
        }
        if (digit > floor((maxInt - i) / w)) {
          error("overflow");
        }
        i += digit * w;
        const t = k <= bias ? tMin : k >= bias + tMax ? tMax : k - bias;
        if (digit < t) {
          break;
        }
        const baseMinusT = base - t;
        if (w > floor(maxInt / baseMinusT)) {
          error("overflow");
        }
        w *= baseMinusT;
      }
      const out = output.length + 1;
      bias = adapt(i - oldi, out, oldi == 0);
      // `i` was supposed to wrap around from `out` to `0`,
      // incrementing `n` each time, so we'll fix that now:
            if (floor(i / out) > maxInt - n) {
        error("overflow");
      }
      n += floor(i / out);
      i %= out;
      // Insert `n` at position `i` of the output.
            output.splice(i++, 0, n);
    }
    return String.fromCodePoint(...output);
  };
  /**
   * Converts a string of Unicode symbols (e.g. a domain name label) to a
   * Punycode string of ASCII-only symbols.
   * @memberOf punycode
   * @param {String} input The string of Unicode symbols.
   * @returns {String} The resulting Punycode string of ASCII-only symbols.
   */  const encode = function(input) {
    const output = [];
    // Convert the input in UCS-2 to an array of Unicode code points.
        input = ucs2decode(input);
    // Cache the length.
        const inputLength = input.length;
    // Initialize the state.
        let n = initialN;
    let delta = 0;
    let bias = initialBias;
    // Handle the basic code points.
        for (const currentValue of input) {
      if (currentValue < 128) {
        output.push(stringFromCharCode(currentValue));
      }
    }
    const basicLength = output.length;
    let handledCPCount = basicLength;
    // `handledCPCount` is the number of code points that have been handled;
    // `basicLength` is the number of basic code points.
    // Finish the basic string with a delimiter unless it's empty.
        if (basicLength) {
      output.push(delimiter);
    }
    // Main encoding loop:
        while (handledCPCount < inputLength) {
      // All non-basic code points < n have been handled already. Find the next
      // larger one:
      let m = maxInt;
      for (const currentValue of input) {
        if (currentValue >= n && currentValue < m) {
          m = currentValue;
        }
      }
      // Increase `delta` enough to advance the decoder's <n,i> state to <m,0>,
      // but guard against overflow.
            const handledCPCountPlusOne = handledCPCount + 1;
      if (m - n > floor((maxInt - delta) / handledCPCountPlusOne)) {
        error("overflow");
      }
      delta += (m - n) * handledCPCountPlusOne;
      n = m;
      for (const currentValue of input) {
        if (currentValue < n && ++delta > maxInt) {
          error("overflow");
        }
        if (currentValue === n) {
          // Represent delta as a generalized variable-length integer.
          let q = delta;
          for (let k = base; ;k += base) {
            const t = k <= bias ? tMin : k >= bias + tMax ? tMax : k - bias;
            if (q < t) {
              break;
            }
            const qMinusT = q - t;
            const baseMinusT = base - t;
            output.push(stringFromCharCode(digitToBasic(t + qMinusT % baseMinusT, 0)));
            q = floor(qMinusT / baseMinusT);
          }
          output.push(stringFromCharCode(digitToBasic(q, 0)));
          bias = adapt(delta, handledCPCountPlusOne, handledCPCount === basicLength);
          delta = 0;
          ++handledCPCount;
        }
      }
      ++delta;
      ++n;
    }
    return output.join("");
  };
  /**
   * Converts a Punycode string representing a domain name or an email address
   * to Unicode. Only the Punycoded parts of the input will be converted, i.e.
   * it doesn't matter if you call it on a string that has already been
   * converted to Unicode.
   * @memberOf punycode
   * @param {String} input The Punycoded domain name or email address to
   * convert to Unicode.
   * @returns {String} The Unicode representation of the given Punycode
   * string.
   */  const toUnicode = function(input) {
    return mapDomain(input, (function(string) {
      return regexPunycode.test(string) ? decode(string.slice(4).toLowerCase()) : string;
    }));
  };
  /**
   * Converts a Unicode string representing a domain name or an email address to
   * Punycode. Only the non-ASCII parts of the domain name will be converted,
   * i.e. it doesn't matter if you call it with a domain that's already in
   * ASCII.
   * @memberOf punycode
   * @param {String} input The domain name or email address to convert, as a
   * Unicode string.
   * @returns {String} The Punycode representation of the given domain name or
   * email address.
   */  const toASCII = function(input) {
    return mapDomain(input, (function(string) {
      return regexNonASCII.test(string) ? "xn--" + encode(string) : string;
    }));
  };
  /*--------------------------------------------------------------------------*/
  /** Define the public API */  const punycode = {
    /**
     * A string representing the current Punycode.js version number.
     * @memberOf punycode
     * @type String
     */
    version: "2.3.1",
    /**
     * An object of methods to convert from JavaScript's internal character
     * representation (UCS-2) to Unicode code points, and back.
     * @see <https://mathiasbynens.be/notes/javascript-encoding>
     * @memberOf punycode
     * @type Object
     */
    ucs2: {
      decode: ucs2decode,
      encode: ucs2encode
    },
    decode: decode,
    encode: encode,
    toASCII: toASCII,
    toUnicode: toUnicode
  };
  // markdown-it default options
    var cfg_default = {
    options: {
      // Enable HTML tags in source
      html: false,
      // Use '/' to close single tags (<br />)
      xhtmlOut: false,
      // Convert '\n' in paragraphs into <br>
      breaks: false,
      // CSS language prefix for fenced blocks
      langPrefix: "language-",
      // autoconvert URL-like texts to links
      linkify: false,
      // Enable some language-neutral replacements + quotes beautification
      typographer: false,
      // Double + single quotes replacement pairs, when typographer enabled,
      // and smartquotes on. Could be either a String or an Array.
      // For example, you can use '«»„“' for Russian, '„“‚‘' for German,
      // and ['«\xA0', '\xA0»', '‹\xA0', '\xA0›'] for French (including nbsp).
      quotes: "\u201c\u201d\u2018\u2019",
      /* “”‘’ */
      // Highlighter function. Should return escaped HTML,
      // or '' if the source string is not changed and should be escaped externaly.
      // If result starts with <pre... internal wrapper is skipped.
      // function (/*str, lang*/) { return ''; }
      highlight: null,
      // Internal protection, recursion limit
      maxNesting: 100
    },
    components: {
      core: {},
      block: {},
      inline: {}
    }
  };
  // "Zero" preset, with nothing enabled. Useful for manual configuring of simple
  // modes. For example, to parse bold/italic only.
    var cfg_zero = {
    options: {
      // Enable HTML tags in source
      html: false,
      // Use '/' to close single tags (<br />)
      xhtmlOut: false,
      // Convert '\n' in paragraphs into <br>
      breaks: false,
      // CSS language prefix for fenced blocks
      langPrefix: "language-",
      // autoconvert URL-like texts to links
      linkify: false,
      // Enable some language-neutral replacements + quotes beautification
      typographer: false,
      // Double + single quotes replacement pairs, when typographer enabled,
      // and smartquotes on. Could be either a String or an Array.
      // For example, you can use '«»„“' for Russian, '„“‚‘' for German,
      // and ['«\xA0', '\xA0»', '‹\xA0', '\xA0›'] for French (including nbsp).
      quotes: "\u201c\u201d\u2018\u2019",
      /* “”‘’ */
      // Highlighter function. Should return escaped HTML,
      // or '' if the source string is not changed and should be escaped externaly.
      // If result starts with <pre... internal wrapper is skipped.
      // function (/*str, lang*/) { return ''; }
      highlight: null,
      // Internal protection, recursion limit
      maxNesting: 20
    },
    components: {
      core: {
        rules: [ "normalize", "block", "inline", "text_join" ]
      },
      block: {
        rules: [ "paragraph" ]
      },
      inline: {
        rules: [ "text" ],
        rules2: [ "balance_pairs", "fragments_join" ]
      }
    }
  };
  // Commonmark default options
    var cfg_commonmark = {
    options: {
      // Enable HTML tags in source
      html: true,
      // Use '/' to close single tags (<br />)
      xhtmlOut: true,
      // Convert '\n' in paragraphs into <br>
      breaks: false,
      // CSS language prefix for fenced blocks
      langPrefix: "language-",
      // autoconvert URL-like texts to links
      linkify: false,
      // Enable some language-neutral replacements + quotes beautification
      typographer: false,
      // Double + single quotes replacement pairs, when typographer enabled,
      // and smartquotes on. Could be either a String or an Array.
      // For example, you can use '«»„“' for Russian, '„“‚‘' for German,
      // and ['«\xA0', '\xA0»', '‹\xA0', '\xA0›'] for French (including nbsp).
      quotes: "\u201c\u201d\u2018\u2019",
      /* “”‘’ */
      // Highlighter function. Should return escaped HTML,
      // or '' if the source string is not changed and should be escaped externaly.
      // If result starts with <pre... internal wrapper is skipped.
      // function (/*str, lang*/) { return ''; }
      highlight: null,
      // Internal protection, recursion limit
      maxNesting: 20
    },
    components: {
      core: {
        rules: [ "normalize", "block", "inline", "text_join" ]
      },
      block: {
        rules: [ "blockquote", "code", "fence", "heading", "hr", "html_block", "lheading", "list", "reference", "paragraph" ]
      },
      inline: {
        rules: [ "autolink", "backticks", "emphasis", "entity", "escape", "html_inline", "image", "link", "newline", "text" ],
        rules2: [ "balance_pairs", "emphasis", "fragments_join" ]
      }
    }
  };
  // Main parser class
    const config = {
    default: cfg_default,
    zero: cfg_zero,
    commonmark: cfg_commonmark
  };
  
  // This validator can prohibit more than really needed to prevent XSS. It's a
  // tradeoff to keep code simple and to be secure by default.
  
  // If you need different setup - override validator method as you wish. Or
  // replace it with dummy function and use external sanitizer.
  
    const BAD_PROTO_RE = /^(vbscript|javascript|file|data):/;
  const GOOD_DATA_RE = /^data:image\/(gif|png|jpeg|webp);/;
  function validateLink(url) {
    // url should be normalized at this point, and existing entities are decoded
    const str = url.trim().toLowerCase();
    return BAD_PROTO_RE.test(str) ? GOOD_DATA_RE.test(str) : true;
  }
  const RECODE_HOSTNAME_FOR = [ "http:", "https:", "mailto:" ];
  function normalizeLink(url) {
    const parsed = urlParse(url, true);
    if (parsed.hostname) {
      // Encode hostnames in urls like:
      // `http://host/`, `https://host/`, `mailto:user@host`, `//host/`
      // We don't encode unknown schemas, because it's likely that we encode
      // something we shouldn't (e.g. `skype:name` treated as `skype:host`)
      if (!parsed.protocol || RECODE_HOSTNAME_FOR.indexOf(parsed.protocol) >= 0) {
        try {
          parsed.hostname = punycode.toASCII(parsed.hostname);
        } catch (er) {}
      }
    }
    return encode$1(format(parsed));
  }
  function normalizeLinkText(url) {
    const parsed = urlParse(url, true);
    if (parsed.hostname) {
      // Encode hostnames in urls like:
      // `http://host/`, `https://host/`, `mailto:user@host`, `//host/`
      // We don't encode unknown schemas, because it's likely that we encode
      // something we shouldn't (e.g. `skype:name` treated as `skype:host`)
      if (!parsed.protocol || RECODE_HOSTNAME_FOR.indexOf(parsed.protocol) >= 0) {
        try {
          parsed.hostname = punycode.toUnicode(parsed.hostname);
        } catch (er) {}
      }
    }
    // add '%' to exclude list because of https://github.com/markdown-it/markdown-it/issues/720
        return decode$1(format(parsed), decode$1.defaultChars + "%");
  }
  /**
   * class MarkdownIt
   *
   * Main parser/renderer class.
   *
   * ##### Usage
   *
   * ```javascript
   * // node.js, "classic" way:
   * var MarkdownIt = require('markdown-it'),
   *     md = new MarkdownIt();
   * var result = md.render('# markdown-it rulezz!');
   *
   * // node.js, the same, but with sugar:
   * var md = require('markdown-it')();
   * var result = md.render('# markdown-it rulezz!');
   *
   * // browser without AMD, added to "window" on script load
   * // Note, there are no dash.
   * var md = window.markdownit();
   * var result = md.render('# markdown-it rulezz!');
   * ```
   *
   * Single line rendering, without paragraph wrap:
   *
   * ```javascript
   * var md = require('markdown-it')();
   * var result = md.renderInline('__markdown-it__ rulezz!');
   * ```
   **/
  /**
   * new MarkdownIt([presetName, options])
   * - presetName (String): optional, `commonmark` / `zero`
   * - options (Object)
   *
   * Creates parser instanse with given config. Can be called without `new`.
   *
   * ##### presetName
   *
   * MarkdownIt provides named presets as a convenience to quickly
   * enable/disable active syntax rules and options for common use cases.
   *
   * - ["commonmark"](https://github.com/markdown-it/markdown-it/blob/master/lib/presets/commonmark.mjs) -
   *   configures parser to strict [CommonMark](http://commonmark.org/) mode.
   * - [default](https://github.com/markdown-it/markdown-it/blob/master/lib/presets/default.mjs) -
   *   similar to GFM, used when no preset name given. Enables all available rules,
   *   but still without html, typographer & autolinker.
   * - ["zero"](https://github.com/markdown-it/markdown-it/blob/master/lib/presets/zero.mjs) -
   *   all rules disabled. Useful to quickly setup your config via `.enable()`.
   *   For example, when you need only `bold` and `italic` markup and nothing else.
   *
   * ##### options:
   *
   * - __html__ - `false`. Set `true` to enable HTML tags in source. Be careful!
   *   That's not safe! You may need external sanitizer to protect output from XSS.
   *   It's better to extend features via plugins, instead of enabling HTML.
   * - __xhtmlOut__ - `false`. Set `true` to add '/' when closing single tags
   *   (`<br />`). This is needed only for full CommonMark compatibility. In real
   *   world you will need HTML output.
   * - __breaks__ - `false`. Set `true` to convert `\n` in paragraphs into `<br>`.
   * - __langPrefix__ - `language-`. CSS language class prefix for fenced blocks.
   *   Can be useful for external highlighters.
   * - __linkify__ - `false`. Set `true` to autoconvert URL-like text to links.
   * - __typographer__  - `false`. Set `true` to enable [some language-neutral
   *   replacement](https://github.com/markdown-it/markdown-it/blob/master/lib/rules_core/replacements.mjs) +
   *   quotes beautification (smartquotes).
   * - __quotes__ - `“”‘’`, String or Array. Double + single quotes replacement
   *   pairs, when typographer enabled and smartquotes on. For example, you can
   *   use `'«»„“'` for Russian, `'„“‚‘'` for German, and
   *   `['«\xA0', '\xA0»', '‹\xA0', '\xA0›']` for French (including nbsp).
   * - __highlight__ - `null`. Highlighter function for fenced code blocks.
   *   Highlighter `function (str, lang)` should return escaped HTML. It can also
   *   return empty string if the source was not changed and should be escaped
   *   externaly. If result starts with <pre... internal wrapper is skipped.
   *
   * ##### Example
   *
   * ```javascript
   * // commonmark mode
   * var md = require('markdown-it')('commonmark');
   *
   * // default mode
   * var md = require('markdown-it')();
   *
   * // enable everything
   * var md = require('markdown-it')({
   *   html: true,
   *   linkify: true,
   *   typographer: true
   * });
   * ```
   *
   * ##### Syntax highlighting
   *
   * ```js
   * var hljs = require('highlight.js') // https://highlightjs.org/
   *
   * var md = require('markdown-it')({
   *   highlight: function (str, lang) {
   *     if (lang && hljs.getLanguage(lang)) {
   *       try {
   *         return hljs.highlight(str, { language: lang, ignoreIllegals: true }).value;
   *       } catch (__) {}
   *     }
   *
   *     return ''; // use external default escaping
   *   }
   * });
   * ```
   *
   * Or with full wrapper override (if you need assign class to `<pre>` or `<code>`):
   *
   * ```javascript
   * var hljs = require('highlight.js') // https://highlightjs.org/
   *
   * // Actual default values
   * var md = require('markdown-it')({
   *   highlight: function (str, lang) {
   *     if (lang && hljs.getLanguage(lang)) {
   *       try {
   *         return '<pre><code class="hljs">' +
   *                hljs.highlight(str, { language: lang, ignoreIllegals: true }).value +
   *                '</code></pre>';
   *       } catch (__) {}
   *     }
   *
   *     return '<pre><code class="hljs">' + md.utils.escapeHtml(str) + '</code></pre>';
   *   }
   * });
   * ```
   *
   **/  function MarkdownIt(presetName, options) {
    if (!(this instanceof MarkdownIt)) {
      return new MarkdownIt(presetName, options);
    }
    if (!options) {
      if (!isString$1(presetName)) {
        options = presetName || {};
        presetName = "default";
      }
    }
    /**
     * MarkdownIt#inline -> ParserInline
     *
     * Instance of [[ParserInline]]. You may need it to add new rules when
     * writing plugins. For simple rules control use [[MarkdownIt.disable]] and
     * [[MarkdownIt.enable]].
     **/    this.inline = new ParserInline;
    /**
     * MarkdownIt#block -> ParserBlock
     *
     * Instance of [[ParserBlock]]. You may need it to add new rules when
     * writing plugins. For simple rules control use [[MarkdownIt.disable]] and
     * [[MarkdownIt.enable]].
     **/    this.block = new ParserBlock;
    /**
     * MarkdownIt#core -> Core
     *
     * Instance of [[Core]] chain executor. You may need it to add new rules when
     * writing plugins. For simple rules control use [[MarkdownIt.disable]] and
     * [[MarkdownIt.enable]].
     **/    this.core = new Core;
    /**
     * MarkdownIt#renderer -> Renderer
     *
     * Instance of [[Renderer]]. Use it to modify output look. Or to add rendering
     * rules for new token types, generated by plugins.
     *
     * ##### Example
     *
     * ```javascript
     * var md = require('markdown-it')();
     *
     * function myToken(tokens, idx, options, env, self) {
     *   //...
     *   return result;
     * };
     *
     * md.renderer.rules['my_token'] = myToken
     * ```
     *
     * See [[Renderer]] docs and [source code](https://github.com/markdown-it/markdown-it/blob/master/lib/renderer.mjs).
     **/    this.renderer = new Renderer;
    /**
     * MarkdownIt#linkify -> LinkifyIt
     *
     * [linkify-it](https://github.com/markdown-it/linkify-it) instance.
     * Used by [linkify](https://github.com/markdown-it/markdown-it/blob/master/lib/rules_core/linkify.mjs)
     * rule.
     **/    this.linkify = new LinkifyIt;
    /**
     * MarkdownIt#validateLink(url) -> Boolean
     *
     * Link validation function. CommonMark allows too much in links. By default
     * we disable `javascript:`, `vbscript:`, `file:` schemas, and almost all `data:...` schemas
     * except some embedded image types.
     *
     * You can change this behaviour:
     *
     * ```javascript
     * var md = require('markdown-it')();
     * // enable everything
     * md.validateLink = function () { return true; }
     * ```
     **/    this.validateLink = validateLink;
    /**
     * MarkdownIt#normalizeLink(url) -> String
     *
     * Function used to encode link url to a machine-readable format,
     * which includes url-encoding, punycode, etc.
     **/    this.normalizeLink = normalizeLink;
    /**
     * MarkdownIt#normalizeLinkText(url) -> String
     *
     * Function used to decode link url to a human-readable format`
     **/    this.normalizeLinkText = normalizeLinkText;
    // Expose utils & helpers for easy acces from plugins
    /**
     * MarkdownIt#utils -> utils
     *
     * Assorted utility functions, useful to write plugins. See details
     * [here](https://github.com/markdown-it/markdown-it/blob/master/lib/common/utils.mjs).
     **/    this.utils = utils;
    /**
     * MarkdownIt#helpers -> helpers
     *
     * Link components parser functions, useful to write plugins. See details
     * [here](https://github.com/markdown-it/markdown-it/blob/master/lib/helpers).
     **/    this.helpers = assign$1({}, helpers);
    this.options = {};
    this.configure(presetName);
    if (options) {
      this.set(options);
    }
  }
  /** chainable
   * MarkdownIt.set(options)
   *
   * Set parser options (in the same format as in constructor). Probably, you
   * will never need it, but you can change options after constructor call.
   *
   * ##### Example
   *
   * ```javascript
   * var md = require('markdown-it')()
   *             .set({ html: true, breaks: true })
   *             .set({ typographer, true });
   * ```
   *
   * __Note:__ To achieve the best possible performance, don't modify a
   * `markdown-it` instance options on the fly. If you need multiple configurations
   * it's best to create multiple instances and initialize each with separate
   * config.
   **/  MarkdownIt.prototype.set = function(options) {
    assign$1(this.options, options);
    return this;
  };
  /** chainable, internal
   * MarkdownIt.configure(presets)
   *
   * Batch load of all options and compenent settings. This is internal method,
   * and you probably will not need it. But if you will - see available presets
   * and data structure [here](https://github.com/markdown-it/markdown-it/tree/master/lib/presets)
   *
   * We strongly recommend to use presets instead of direct config loads. That
   * will give better compatibility with next versions.
   **/  MarkdownIt.prototype.configure = function(presets) {
    const self = this;
    if (isString$1(presets)) {
      const presetName = presets;
      presets = config[presetName];
      if (!presets) {
        throw new Error('Wrong `markdown-it` preset "' + presetName + '", check name');
      }
    }
    if (!presets) {
      throw new Error("Wrong `markdown-it` preset, can't be empty");
    }
    if (presets.options) {
      self.set(presets.options);
    }
    if (presets.components) {
      Object.keys(presets.components).forEach((function(name) {
        if (presets.components[name].rules) {
          self[name].ruler.enableOnly(presets.components[name].rules);
        }
        if (presets.components[name].rules2) {
          self[name].ruler2.enableOnly(presets.components[name].rules2);
        }
      }));
    }
    return this;
  };
  /** chainable
   * MarkdownIt.enable(list, ignoreInvalid)
   * - list (String|Array): rule name or list of rule names to enable
   * - ignoreInvalid (Boolean): set `true` to ignore errors when rule not found.
   *
   * Enable list or rules. It will automatically find appropriate components,
   * containing rules with given names. If rule not found, and `ignoreInvalid`
   * not set - throws exception.
   *
   * ##### Example
   *
   * ```javascript
   * var md = require('markdown-it')()
   *             .enable(['sub', 'sup'])
   *             .disable('smartquotes');
   * ```
   **/  MarkdownIt.prototype.enable = function(list, ignoreInvalid) {
    let result = [];
    if (!Array.isArray(list)) {
      list = [ list ];
    }
    [ "core", "block", "inline" ].forEach((function(chain) {
      result = result.concat(this[chain].ruler.enable(list, true));
    }), this);
    result = result.concat(this.inline.ruler2.enable(list, true));
    const missed = list.filter((function(name) {
      return result.indexOf(name) < 0;
    }));
    if (missed.length && !ignoreInvalid) {
      throw new Error("MarkdownIt. Failed to enable unknown rule(s): " + missed);
    }
    return this;
  };
  /** chainable
   * MarkdownIt.disable(list, ignoreInvalid)
   * - list (String|Array): rule name or list of rule names to disable.
   * - ignoreInvalid (Boolean): set `true` to ignore errors when rule not found.
   *
   * The same as [[MarkdownIt.enable]], but turn specified rules off.
   **/  MarkdownIt.prototype.disable = function(list, ignoreInvalid) {
    let result = [];
    if (!Array.isArray(list)) {
      list = [ list ];
    }
    [ "core", "block", "inline" ].forEach((function(chain) {
      result = result.concat(this[chain].ruler.disable(list, true));
    }), this);
    result = result.concat(this.inline.ruler2.disable(list, true));
    const missed = list.filter((function(name) {
      return result.indexOf(name) < 0;
    }));
    if (missed.length && !ignoreInvalid) {
      throw new Error("MarkdownIt. Failed to disable unknown rule(s): " + missed);
    }
    return this;
  };
  /** chainable
   * MarkdownIt.use(plugin, params)
   *
   * Load specified plugin with given params into current parser instance.
   * It's just a sugar to call `plugin(md, params)` with curring.
   *
   * ##### Example
   *
   * ```javascript
   * var iterator = require('markdown-it-for-inline');
   * var md = require('markdown-it')()
   *             .use(iterator, 'foo_replace', 'text', function (tokens, idx) {
   *               tokens[idx].content = tokens[idx].content.replace(/foo/g, 'bar');
   *             });
   * ```
   **/  MarkdownIt.prototype.use = function(plugin /*, params, ... */) {
    const args = [ this ].concat(Array.prototype.slice.call(arguments, 1));
    plugin.apply(plugin, args);
    return this;
  };
  /** internal
   * MarkdownIt.parse(src, env) -> Array
   * - src (String): source string
   * - env (Object): environment sandbox
   *
   * Parse input string and return list of block tokens (special token type
   * "inline" will contain list of inline tokens). You should not call this
   * method directly, until you write custom renderer (for example, to produce
   * AST).
   *
   * `env` is used to pass data between "distributed" rules and return additional
   * metadata like reference info, needed for the renderer. It also can be used to
   * inject data in specific cases. Usually, you will be ok to pass `{}`,
   * and then pass updated object to renderer.
   **/  MarkdownIt.prototype.parse = function(src, env) {
    if (typeof src !== "string") {
      throw new Error("Input data should be a String");
    }
    const state = new this.core.State(src, this, env);
    this.core.process(state);
    return state.tokens;
  };
  /**
   * MarkdownIt.render(src [, env]) -> String
   * - src (String): source string
   * - env (Object): environment sandbox
   *
   * Render markdown string into html. It does all magic for you :).
   *
   * `env` can be used to inject additional metadata (`{}` by default).
   * But you will not need it with high probability. See also comment
   * in [[MarkdownIt.parse]].
   **/  MarkdownIt.prototype.render = function(src, env) {
    env = env || {};
    return this.renderer.render(this.parse(src, env), this.options, env);
  };
  /** internal
   * MarkdownIt.parseInline(src, env) -> Array
   * - src (String): source string
   * - env (Object): environment sandbox
   *
   * The same as [[MarkdownIt.parse]] but skip all block rules. It returns the
   * block tokens list with the single `inline` element, containing parsed inline
   * tokens in `children` property. Also updates `env` object.
   **/  MarkdownIt.prototype.parseInline = function(src, env) {
    const state = new this.core.State(src, this, env);
    state.inlineMode = true;
    this.core.process(state);
    return state.tokens;
  };
  /**
   * MarkdownIt.renderInline(src [, env]) -> String
   * - src (String): source string
   * - env (Object): environment sandbox
   *
   * Similar to [[MarkdownIt.render]] but for single paragraph content. Result
   * will NOT be wrapped into `<p>` tags.
   **/  MarkdownIt.prototype.renderInline = function(src, env) {
    env = env || {};
    return this.renderer.render(this.parseInline(src, env), this.options, env);
  };
  return MarkdownIt;
}));