RequestAnimationFrame and CancelAnimationFrame as AMD modules

gistfile1.js

define('vendors', function() {
  return ['ms', 'moz', 'webkit', 'o'];
});

define('requestAnimationFrame', ['root', 'vendors'], function(root, vendors) {
  // frameRate is only used if requestAnimationFrame is not available
  var frameRate = 60;

  var requestAnimationFrame = root.requestAnimationFrame;

  for (var x = 0; x < vendors.length && !root.requestAnimationFrame; ++x) {
    requestAnimationFrame = root[vendors[x] + 'RequestAnimationFrame'];

    if (requestAnimationFrame) {
      break;
    }
  }

  if (!requestAnimationFrame) {
    requestAnimationFrame = function(callback) {
      root.setTimeout(callback, ~~(1000 / root.frameRate));
    };
  }

  return requestAnimationFrame;
});

define('cancelAnimationFrame', ['root', 'vendors'], function(root, vendors) {

  var cancelAnimationFrame = root.cancelAnimationFrame;

  for (var x = 0; x < vendors.length && !root.cancelAnimationFrame; ++x) {
    cancelAnimationFrame = root[vendors[x] + 'CancelRequestAnimationFrame'];

    if (cancelAnimationFrame) {
      break;
    }
  }

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