hae/src/components/spinner/requestAnimationFrame.js

Mobile web UI based on Vux

var lastTime = 0
var vendors = ['webkit', 'moz']
for (var x = 0; x < vendors.length && !window.requestAnimationFrame; ++x) {
  window.requestAnimationFrame = window[vendors[x] + 'RequestAnimationFrame']
  window.cancelAnimationFrame = window[vendors[x] + 'CancelAnimationFrame'] || window[vendors[x] + 'CancelRequestAnimationFrame']
}

if (!window.requestAnimationFrame) {
  window.requestAnimationFrame = function (callback, element) {
    var currTime = new Date().getTime()
    var timeToCall = Math.max(0, 16 - (currTime - lastTime))
    var id = window.setTimeout(function () {
      callback(currTime + timeToCall)
    }, timeToCall)
    lastTime = currTime + timeToCall
    return id
  }
}
if (!window.cancelAnimationFrame) {
  window.cancelAnimationFrame = function (id) {
    clearTimeout(id)
  }
}