Added `cancelAnimationFrame`-Polyfill, fixes #316

1 files changed, 29 insertions, 1 deletions

diff --git a/src/polyfill.js b/src/polyfill.js
index 3a3c25c..a913337 100644
--- a/src/polyfill.js
+++ b/src/polyfill.js
@@ -11,4 +11,32 @@ if (typeof CustomEvent !== 'function') {
   CustomEvent.prototype = window.Event.prototype
 
   window.CustomEvent = CustomEvent
-}
\ No newline at end of file
+}
+
+// requestAnimationFrame / cancelAnimationFrame Polyfill with fallback based on Paul Irish
+(function(w) {
+  var lastTime = 0
+  var vendors = ['moz', 'webkit']
+  
+  for(var x = 0; x < vendors.length && !window.requestAnimationFrame; ++x) {
+    w.requestAnimationFrame = w[vendors[x] + 'RequestAnimationFrame']
+    w.cancelAnimationFrame  = w[vendors[x] + 'CancelAnimationFrame'] ||
+                              w[vendors[x] + 'CancelRequestAnimationFrame']
+  }
+ 
+  w.requestAnimationFrame = w.requestAnimationFrame || 
+    function(callback) {
+      var currTime = new Date().getTime()
+      var timeToCall = Math.max(0, 16 - (currTime - lastTime))
+      
+      var id = w.setTimeout(function() {
+        callback(currTime + timeToCall)
+      }, timeToCall)
+      
+      lastTime = currTime + timeToCall
+      return id
+    }
+ 
+  w.cancelAnimationFrame = w.cancelAnimationFrame || w.clearTimeout;
+
+}(window))
\ No newline at end of file