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<!DOCTYPE html>
<html>
<title>The :unresolved pseudoclass matching type extension</title>
<link rel="author" title="Aleksei Yu. Semenov" href="mailto:a.semenov@unipro.ru">
<meta name="assert" content="The :unresolved pseudoclass must match all custom elements whose created callback has not yet been invoked">
<link rel="help" href="http://www.w3.org/TR/custom-elements/#unresolved-element-pseudoclass">
<link rel="match" href="unresolved-element-pseudoclass-css-test-registered-type-extension-ref.html">
<style>
:unresolved {
background-color: red;
}
a {
background-color: yellow;
}
body {
background-color: white;
}
</style>
<script>
function registerXElement() {
var obj = document.createElement('a');
var proto = Object.create(obj.constructor.prototype);
document.registerElement('x-element', { prototype: proto, extends: 'a'});
}
</script>
<body onload="registerXElement();">
<p>Test passes if x-element background below is yellow</p>
<a is="x-element">
x-element
</a>
</body>
</html>
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