multimediaobject/src/lib/raf.js

Multimediaobject library

/* eslint-disable */
// http://paulirish.com/2011/requestanimationframe-for-smart-animating/
// http://my.opera.com/emoller/blog/2011/12/20/requestanimationframe-for-smart-er-animating

// requestAnimationFrame polyfill by Erik Möller. fixes from Paul Irish and Tino Zijdel

// MIT license

export default () => {
  let lastTime = 0;
  const vendors = ['ms', 'moz', 'webkit', 'o'];
  for (let 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) {
      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;
    };
  }

  if (!window.cancelAnimationFrame) {
    window.cancelAnimationFrame = function (id) {
      clearTimeout(id);
    };
  }
};