Checking instanceof Arrays cross frames (needed for the vjs.Player.prototype.src method)

src/js/component.js

@@ -471,7 +471,7 @@ vjs.Component.prototype.initChildren = function(){
 
   if (children) {
     // Allow for an array of children details to passed in the options
-    if (children instanceof Array) {
+    if (vjs.obj.isArray(children)) {
       for (var i = 0; i < children.length; i++) {
         child = children[i];
 

src/js/lib.js

@@ -160,6 +160,17 @@ vjs.obj.isPlain = function(obj){
     && obj.constructor === Object;
 };
 
+/**
+ * Check if an object is Array
+*  Since instanceof Array will not work on arrays created in another frame we need to use Array.isArray, but since IE8 does not support Array.isArray we need this shim
+ * @param  {Object} obj Object to check
+ * @return {Boolean}     True if plain, false otherwise
+ * @private
+ */
+vjs.obj.isArray = Array.isArray || function(arr) {
+  return Object.prototype.toString.call(arr) === '[object Array]';
+};
+
 /**
  * Bind (a.k.a proxy or Context). A simple method for changing the context of a function
    It also stores a unique id on the function so it can be easily removed from events

src/js/player.js

@@ -1081,7 +1081,7 @@ vjs.Player.prototype.src = function(source){
   }
 
   // Case: Array of source objects to choose from and pick the best to play
-  if (source instanceof Array) {
+  if (vjs.obj.isArray(source)) {
 
     var sourceTech = this.selectSource(source),
         techName;

test/unit/lib.js

@@ -41,6 +41,14 @@ test('should copy an object', function(){
   deepEqual(asdf,fdsa);
 });
 
+test('should check if an object is an Array', function(){
+  var arr = ['a', 'b', 'c'];
+  ok(vjs.obj.isArray(arr) === true, 'Arr object is an Array');
+
+  var obj = {};
+  ok(vjs.obj.isArray(obj) === false, 'Obj is not an Array');
+});
+
 test('should check if an object is plain', function(){
   var empty = {};
   ok(vjs.obj.isPlain(empty) === true, 'Empty object is plain');