diff --git a/node_modules/material-design-lite/src/third_party/rAF.js b/node_modules/material-design-lite/src/third_party/rAF.js
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+// Source: https://github.com/darius/requestAnimationFrame/blob/master/requestAnimationFrame.js
+// Adapted from https://gist.github.com/paulirish/1579671 which derived from
+// 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, Tino Zijdel, Andrew Mao, Klemen Slavič, Darius Bacon
+
+// MIT license
+
+(function() {
+  'use strict';
+
+  if (!Date.now) {
+    /**
+     * Date.now polyfill.
+     * @return {number} the current Date
+     */
+    Date.now = function() { return new Date().getTime(); };
+    Date['now'] = Date.now;
+  }
+
+  var vendors = ['webkit', 'moz'];
+  for (var i = 0; i < vendors.length && !window.requestAnimationFrame; ++i) {
+    var vp = vendors[i];
+    window.requestAnimationFrame = window[vp + 'RequestAnimationFrame'];
+    window.cancelAnimationFrame = (window[vp + 'CancelAnimationFrame'] ||
+        window[vp + 'CancelRequestAnimationFrame']);
+    window['requestAnimationFrame'] = window.requestAnimationFrame;
+    window['cancelAnimationFrame'] = window.cancelAnimationFrame;
+  }
+
+  if (/iP(ad|hone|od).*OS 6/.test(window.navigator.userAgent) || !window.requestAnimationFrame || !window.cancelAnimationFrame) {
+    var lastTime = 0;
+    /**
+     * requestAnimationFrame polyfill.
+     * @param  {!Function} callback the callback function.
+     */
+    window.requestAnimationFrame = function(callback) {
+      var now = Date.now();
+      var nextTime = Math.max(lastTime + 16, now);
+      return setTimeout(function() { callback(lastTime = nextTime); },
+                        nextTime - now);
+    };
+    window.cancelAnimationFrame = clearTimeout;
+    window['requestAnimationFrame'] = window.requestAnimationFrame;
+    window['cancelAnimationFrame'] = window.cancelAnimationFrame;
+  }
+
+})();