export declare const animation: (option: {
    duration: number;
    from: number;
    to: number;
    formulaFn?: ((t: number, b: number, c: number, d: number) => number) | undefined;
    onStart?: ((value: number) => void) | undefined;
    onEnd?: ((value: number) => void) | undefined;
    onStop?: ((value: number) => void) | undefined;
    onPlay?: ((value: number) => void) | undefined;
}, fn: (value: number) => void) => void;
/**
 *
 */
export default class Animation {
    private startTime;
    private opt;
    private value;
    private stopTime;
    private stopStartTime;
    private requestAnimationId;
    isStop: boolean;
    isEnd: boolean;
    onChange?: (value: number) => void;
    onStart?: (value: number) => void;
    onEnd?: (value: number) => void;
    constructor(option: {
        duration: number;
        from: number;
        to: number;
        formulaFn?: (t: number, b: number, c: number, d: number) => number;
    });
    private run;
    private change;
    onStop(): void;
    onPlay(): void;
    destroyed(): void;
}