Bug 105397

Summary: [Shadow DOM]: ShadowRoot object is not defined error
Product: WebKit Reporter: Sergey G. Grekhov <sgrekhov>
Component: DOMAssignee: Nobody <webkit-unassigned>
Status: RESOLVED DUPLICATE    
Severity: Normal CC: hayato, tasak, webcomponents-bugzilla
Priority: P2    
Version: 528+ (Nightly build)   
Hardware: Unspecified   
OS: Unspecified   

Description Sergey G. Grekhov 2012-12-19 00:02:45 PST 
ShadowRoot object is not recognized by instanceof operator. Chrome 25.0.1364.0 canary. Test:

<html>
<head>
<script type="text/javascript">
function test() {
    if (document instanceof ShadowRoot) {
    	alert('This is the End!');
    }  else {
    	alert('Ok');
    }
}
</script>
</head>
<body onload="test()">
</body>
</html>

Observe the console: Uncaught ReferenceError: ShadowRoot is not defined
Comment 1 Hayato Ito 2012-12-19 01:36:39 PST 
Nice catch. https://bugs.webkit.org/show_bug.cgi?id=105385 will fix this.

Note that we have to use WebKitShadowRoot instead of SahdowRoot.
e.g.
  someElement instanceof WebKitShadowRoot.

*** This bug has been marked as a duplicate of bug 105385 ***