import { noop } from '.';
/**
 * 异步调用某个函数的简单实现，这里混用了 MicroTask 与 MacroTask
 */
export declare const defer: typeof setTimeout | (<TResult1 = void, TResult2 = never>(onfulfilled?: (value: void) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>);
/** 兼容不同环境的 requestAnimationFrame 实现 */
export declare let raf: typeof noop;
export declare function getRaf(): typeof noop;
export declare function setRaf(_raf: typeof raf): void;
/** 使用 MicroTask 来异步执行批次任务 */
export declare const nextTick: (cb?: Function, ctx?: object) => void | Promise<any>;
export interface EventLoopTask {
    abort(): void;
    promise: Promise<void>;
}
export declare function clearLoops(): void;
export declare function loop(fn: (num: number) => void): EventLoopTask;