diff --git a/javascript.html.markdown b/javascript.html.markdown
index f2dd08c8..35bcf988 100644
--- a/javascript.html.markdown
+++ b/javascript.html.markdown
@@ -248,7 +248,9 @@ for (var x in person){
     description += person[x] + " ";
 } // description = 'Paul Ken 18 '
 
-// The for/of statement allows iteration over an iterator.
+// The for/of statement allows iteration over iterable objects (including the built-in String, 
+// Array, e.g. the Array-like arguments or NodeList objects, TypedArray, Map and Set, 
+// and user-defined iterables).
 var myPets = "";
 var pets = ["cat", "dog", "hamster", "hedgehog"];
 for (var pet of pets){