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<base href="https://bugs.webkit.org/" />
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - importNode from template doesn't instantiate custom element"
href="https://bugs.webkit.org/show_bug.cgi?id=163147">163147</a>
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<th>Summary</th>
<td>importNode from template doesn't instantiate custom element
</td>
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<th>Classification</th>
<td>Unclassified
</td>
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<th>Product</th>
<td>WebKit
</td>
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<th>Version</th>
<td>Safari Technology Preview
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<th>Hardware</th>
<td>Unspecified
</td>
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<th>OS</th>
<td>Unspecified
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>Normal
</td>
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<th>Priority</th>
<td>P2
</td>
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<th>Component</th>
<td>HTML DOM
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<th>Assignee</th>
<td>webkit-unassigned@lists.webkit.org
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</tr>
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<th>Reporter</th>
<td>jan@component.kitchen
</td>
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<th>CC</th>
<td>cdumez@apple.com
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<p>
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<pre>See <a href="http://jsbin.com/tukocup/1/edit?html,console">http://jsbin.com/tukocup/1/edit?html,console</a>.
class TestElement extends HTMLElement {}
customElements.define('test-element', TestElement);
let template = document.createElement('template');
template.innerHTML = `<test-element></test-element>`;
let clone = document.importNode(template.content, true);
let element = clone.querySelector('test-element');
console.log(element instanceof TestElement); // true in Chrome Canary, false in WebKit
This defines a custom element, then tries to use it in a template. Following the importNode call, the test-element node should be an instance of TestElement, but it's not. (It works as expected in Chrome Canary.)</pre>
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