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<!DOCTYPE html>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<body>
<script>
promise_test(async t => {
assert_implements("HTMLPortalElement" in self);
var iframe = document.createElement("iframe");
iframe.src = "resources/portal-inside-iframe.html"
var waitForLoad = new Promise((resolve, reject) => {
iframe.onload = resolve;
});
document.body.appendChild(iframe);
await waitForLoad;
const portal = iframe.contentDocument.getElementById("portal");
return promise_rejects_dom(t, "InvalidStateError",
iframe.contentWindow.DOMException,
portal.activate());
}, "activating portal inside iframe should fail");
</script>
</body>
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