import type { EasingType } from '@visactor/vrender-core';
import { ACustomAnimate } from './custom-animate';
export declare class FromTo extends ACustomAnimate<Record<string, number>> {
    valid: boolean;
    keys: string[];
    constructor(from: null, to: null, duration: number, easing: EasingType, params?: any);
    onBind(): void;
    onFirstRun(): void;
    deleteSelfAttr(key: string): void;
    update(end: boolean, ratio: number, out: Record<string, any>): void;
}