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<!DOCTYPE html>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<body>
<script>
test(() => {
let portal = document.createElement("portal");
let xmlDoc = document.implementation.createDocument("", null);
xmlDoc.appendChild(portal);
}, "inserting a portal element into an XML document shouldn't crash or throw");
test(() => {
let iframe = document.createElement("iframe");
document.body.appendChild(iframe);
let doc = iframe.contentDocument;
iframe.remove();
let portal = document.createElement("portal");
doc.body.appendChild(portal);
}, "inserting a portal element into a detached iframe's document shouldn't crash or throw");
test(() => {
let iframe = document.createElement("iframe");
document.body.appendChild(iframe);
let doc = iframe.contentDocument;
iframe.remove();
let portal = doc.createElement("portal");
doc.body.appendChild(portal);
}, "creating a portal element with a detached iframe's document shouldn't crash or throw");
</script>
</body>
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