isKey.js 900 B

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  1. // @ts-nocheck
  2. import isSymbol from "./isSymbol.js";
  3. /** Used to match property names within property paths. */
  4. const reIsDeepProp = /\.|\[(?:[^[\]]*|(["'])(?:(?!\1)[^\\]|\\.)*?\1)\]/;
  5. const reIsPlainProp = /^\w*$/;
  6. /**
  7. * Checks if `value` is a property name and not a property path.
  8. *
  9. * @private
  10. * @param {*} value The value to check.
  11. * @param {Object} [object] The object to query keys on.
  12. * @returns {boolean} Returns `true` if `value` is a property name, else `false`.
  13. */
  14. function isKey(value, object) {
  15. if (Array.isArray(value)) {
  16. return false;
  17. }
  18. const type = typeof value;
  19. if (type === "number" ||
  20. type === "boolean" ||
  21. value == null ||
  22. isSymbol(value)) {
  23. return true;
  24. }
  25. return (reIsPlainProp.test(value) ||
  26. !reIsDeepProp.test(value) ||
  27. (object != null && value in Object(object)));
  28. }
  29. export default isKey;