A better check for ArrayIterator and its subclasses.

paulmillr · Aug 7, 2014 · 396a3fc · 396a3fc
1 parent db6c5a0
commit 396a3fc
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/es6-shim.js b/es6-shim.js
@@ -622,10 +622,10 @@
     defineProperties(ArrayIterator.prototype, {
       next: function() {
         var i = this.i, array = this.array;
-        if (i === undefined || this.kind === undefined) {
+        if (!(this instanceof ArrayIterator)) {
           throw new TypeError('Not an ArrayIterator');
         }
-        if (array!==undefined) {
+        if (array !== undefined) {
           var len = ES.ToLength(array.length);
           for (; i < len; i++) {
             var kind = this.kind;