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<!doctype html>
<meta charset=utf-8>
<title>navigator.clipboard write on detaching iframe</title>
<link rel='help' href='https://w3c.github.io/clipboard-apis/#async-clipboard-api'>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/resources/testdriver.js"></script>
<script src="/resources/testdriver-vendor.js"></script>
<script src="../resources/user-activation.js"></script>
<iframe id="iframe"></iframe>
<script>
'use strict';
promise_test(async t => {
// This tests proper behavior on a detaching iframe. text/plain is chosen for
// simplicity, and the test should fail the same way no matter what the input
// type is.
await tryGrantReadPermission();
await tryGrantWritePermission();
const iframe = document.getElementById('iframe');
const iframeClipboard = iframe.contentWindow.navigator.clipboard;
const blobInput = new Blob(['test string'], {type: 'text/plain'});
const clipboardItemInput = new ClipboardItem({'text/plain': blobInput});
// Clipboard API must only be available in focused documents.
// reference: https://www.w3.org/TR/clipboard-apis/#privacy-async
iframe.focus();
// An iframe detaching while writing to the clipboard should fail, but not
// crash. The lack of await here means that the iframe will detach while the
// write operation is running.
iframeClipboard.write([clipboardItemInput]);
iframe.parentNode.removeChild(iframe);
}, 'Verify write fails on detaching iframe');
</script>
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