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Test Info: Warnings
- This test gets skipped with pattern: os == 'linux' && os_version == '24.04' && arch == 'x86_64' && debug && verify-standalone
- Manifest: dom/base/test/mochitest.toml
<!DOCTYPE html>
<html>
<head>
<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css">
<script src="/tests/SimpleTest/SimpleTest.js"></script>
</head>
<body onload="startTests()">
<a href="https://bugzilla.mozilla.org/show_bug.cgi?id=783129" target="_blank">Mozilla Bug 783129</a>
<iframe id="fooframe" src="/"></iframe>
<script type="application/javascript">
SimpleTest.waitForExplicitFinish();
function startTests() {
var frame = document.getElementById("fooframe");
class XFoo extends frame.contentWindow.HTMLElement {};
frame.contentWindow.customElements.define("x-foo", XFoo);
var elem = new XFoo();
is(elem.tagName, "X-FOO", "Constructor should create an x-foo element.");
var anotherElem = $("fooframe").contentDocument.createElement("x-foo");
is(anotherElem.tagName, "X-FOO", "createElement should create an x-foo element.");
SimpleTest.finish();
}
</script>
</body>
</html>