Josh W. Comeau——那个写《CSS for JavaScript Developers》的 Josh——最近在他的博客上发了篇文章，直接拿 CSS keyframes、原生 JS ...

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大家好，我是林三心，用最通俗易懂的话讲最难的知识点是我的座右铭，基础是进阶的前提是我的初心~ 之前我写了一个埋点库 sunshine-track，很多人问我为啥批量上报埋点信息的时候，用的是 requestIdleCallback而不是 requestAnimationFrame，今天就解答一下 在前端性能 ...

正向毫秒级计时器主要就是利用了 window.requestAnimationFrame 的回调函数的参数为 DOMHighResTimeStamp ，且与 performance.now() 的返回值相同；在实现暂停、继续时，需要计算一下补时时间。 从图上可以看出来，核心就是一个正向计时器。通过js实现 ...

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Why this particular requestAnimationFrame polyfill? Because most (all?) of the other ones have a hidden flaw: they can't handle multiple, simultaneous animations. See a fuller explanation on this blog ...

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