Merge pull request #469 from arv/hidden-property

Add support for reflecting the hidden attribute

Author: dfreedm

src/wrappers/HTMLElement.js

@@ -230,6 +230,17 @@
 
       var df = frag(contextElement, text);
       contextElement.insertBefore(df, refNode);
+    },
+
+    get hidden() {
+      return this.hasAttribute('hidden');
+    },
+    set hidden(v) {
+      if (v) {
+        this.setAttribute('hidden', '');
+      } else {
+        this.removeAttribute('hidden');
+      }
     }
   });
 

test/js/HTMLElement.js

@@ -101,4 +101,13 @@ suite('HTMLElement', function() {
     assert.equal(div.innerHTML, '<!--&\u00A0<>"-->');
   });
 
+  test('hidden property', function() {
+    var div = document.createElement('div');
+    assert.isFalse(div.hidden);
+    div.hidden = true;
+    assert.isTrue(div.hasAttribute('hidden'));
+    assert.equal(div.getAttribute('hidden'), '');
+    div.hidden = false;
+    assert.isFalse(div.hasAttribute('hidden'));
+  });
 });