export declare class AnimationFrame {
    animationId: number | null;
    isInProgress: boolean;
    startedAt: number | null;
    constructor();
    /**
     *
     * @param renderFrame- Function to render screen using the animation progress percentage.
     * @param duration- Duration of the animation, in MS.
     */
    start(renderFrame: RenderFrame, duration: number, shouldRunForever?: boolean): void;
    stop(): void;
}
/**
 * @param progressPercent- Progress of the animation in percentage, from 0 ~ 1
 */
export type RenderFrame = (progressPercent: number) => void;
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