20 lines
492 B
TypeScript
20 lines
492 B
TypeScript
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// @ts-nocheck
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// import {isBrowser} from '../isBrowser'
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// 是否支持被动事件监听
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export const supportsPassive = true;
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// 请求动画帧
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export function raf(fn: TimerCallback): number {
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return setTimeout(fn, 1000 / 30);
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}
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// 取消动画帧
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export function cancelRaf(id: number) {
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clearTimeout(id);
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}
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// 双倍动画帧
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export function doubleRaf(fn: TimerCallback): void {
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raf(() => raf(fn)); // 在下一帧回调中再次请求动画帧，实现双倍动画帧效果
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}
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