import { OnInit, EventEmitter, SimpleChanges, OnChanges } from '@angular/core';
export declare class CaptchaComponent implements OnInit, OnChanges {
    imageUrl: any;
    className: any;
    iconClass: any;
    refreshIcon: string;
    isRefreshImage: any;
    key: EventEmitter<string>;
    imageLink: any;
    id: string;
    constructor();
    ngOnInit(): void;
    ngOnChanges(changes: SimpleChanges): void;
    createCpatcha(): void;
    idGenerator(): string;
}