import { ElementRef, OnDestroy, OnInit } from '@angular/core';
import { Subscription } from 'rxjs';
import { NzUploadFile, ZipButtonOptions } from './interface';
import * as i0 from "@angular/core";
export declare class NzUploadBtnComponent implements OnInit, OnDestroy {
    private elementRef;
    reqs: Record<string, Subscription>;
    private destroy;
    private destroy$;
    file: ElementRef<HTMLInputElement>;
    options: ZipButtonOptions;
    onClick(): void;
    onFileDrop(e: DragEvent): void;
    onChange(e: Event): void;
    private traverseFileTree;
    private attrAccept;
    private attachUid;
    uploadFiles(fileList: FileList | File[]): void;
    private upload;
    private post;
    private xhr;
    private clean;
    abort(file?: NzUploadFile): void;
    private http;
    constructor(elementRef: ElementRef);
    ngOnInit(): void;
    ngOnDestroy(): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<NzUploadBtnComponent, never>;
    static ɵcmp: i0.ɵɵComponentDeclaration<NzUploadBtnComponent, "[nz-upload-btn]", ["nzUploadBtn"], { "options": { "alias": "options"; "required": false; }; }, {}, never, ["*"], true, never>;
}