import { TutorialStage, TutorialOptions } from './interface';
import { Subject } from 'rxjs';
export declare class Walkthrough {
    static storageContainerID: string;
    static readText: string;
    static stopReadText: string;
    static animationDuration: number;
    private currentStep;
    private steps;
    private parent;
    private prompt;
    private curtain;
    private element;
    private storageContainer;
    private options;
    private onEnd;
    private tts;
    private utils;
    private storage;
    private style;
    constructor();
    setTutorial(steps: Array<TutorialStage>, options?: TutorialOptions): Subject<boolean>;
    private initStorageContainer;
    private setStorageContainer;
    deployStep(step: TutorialStage): void;
    private getElementByStage;
    private getCurtain;
    fixElementAndPrompt(): void;
    private getPrompt;
    private removeCurrentPrompt;
    private removeCurrentCurtain;
    private clearCurrentElement;
    private clearCSS;
    injectCss(force?: boolean): void;
    onExit(): void;
    next(): void;
    prev(): void;
    toggleRead(): void;
    destroy(incrementCounter: boolean): void;
}