airopt-manager/adi-ui/.pnpm-store/v10/files/36/c55d96c3432b1a0051d42f4398787cf406a39857007a7421ce9ed7e07c674a94bb0569bdf25d79f151692a3f4c70bc4205e3f5f323fa4fde7fddb2f328fa7e

let lastTime = 0
const prefixes = 'webkit moz ms o'.split(' ') // 各浏览器前缀

let requestAnimationFrame
let cancelAnimationFrame

const isServer = typeof window === 'undefined'
if (isServer) {
  requestAnimationFrame = function() {
    return
  }
  cancelAnimationFrame = function() {
    return
  }
} else {
  requestAnimationFrame = window.requestAnimationFrame
  cancelAnimationFrame = window.cancelAnimationFrame
  let prefix
    // 通过遍历各浏览器前缀，来得到requestAnimationFrame和cancelAnimationFrame在当前浏览器的实现形式
  for (let i = 0; i < prefixes.length; i++) {
    if (requestAnimationFrame && cancelAnimationFrame) { break }
    prefix = prefixes[i]
    requestAnimationFrame = requestAnimationFrame || window[prefix + 'RequestAnimationFrame']
    cancelAnimationFrame = cancelAnimationFrame || window[prefix + 'CancelAnimationFrame'] || window[prefix + 'CancelRequestAnimationFrame']
  }

  // 如果当前浏览器不支持requestAnimationFrame和cancelAnimationFrame，则会退到setTimeout
  if (!requestAnimationFrame || !cancelAnimationFrame) {
    requestAnimationFrame = function(callback) {
      const currTime = new Date().getTime()
      // 为了使setTimteout的尽可能的接近每秒60帧的效果
      const timeToCall = Math.max(0, 16 - (currTime - lastTime))
      const id = window.setTimeout(() => {
        callback(currTime + timeToCall)
      }, timeToCall)
      lastTime = currTime + timeToCall
      return id
    }

    cancelAnimationFrame = function(id) {
      window.clearTimeout(id)
    }
  }
}

export { requestAnimationFrame, cancelAnimationFrame }