adui/components/_util/raf.ts

<div> <img src="https://wxa.wxs.qq.com/mpweb/delivery/legacy/wxadtouch/upload/t1/od834zef_52939fc6.png" style="margin:40px 0 0 -8px; background-color: #fcfcfc; box-shadow: none;" /> </div>

type ICb = (time: number) => void

function requestAnimationFramePolyfill() {
  let lastTime = 0
  return (callback: ICb) => {
    const currTime = new Date().getTime()
    const timeToCall = Math.max(0, 16 - (currTime - lastTime))
    const id = window.setTimeout(() => {
      callback(currTime + timeToCall)
    }, timeToCall)
    lastTime = currTime + timeToCall
    return id
  }
}
function getRequestAnimationFrame() {
  if (typeof window === "undefined") {
    return () => {}
  }
  const { requestAnimationFrame } = window
  if (requestAnimationFrame) {
    return requestAnimationFrame
  }
  return requestAnimationFramePolyfill()
}

export { getRequestAnimationFrame }