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Test Info:
- This WPT test may be referenced by the following Test IDs:
- /webmessaging/postMessage_crosssite.sub.htm - WPT Dashboard Interop Dashboard
<!DOCTYPE html>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<body>
<script>
async function addIframeAndReceiveMessage(path) {
let url = new URL('resources/transfer-arraybuffer-to-parent.html', location);
url.hostname = '{{hosts[alt][]}}';
let frame = document.createElement('iframe');
try {
frame.src = url;
document.body.appendChild(frame);
return await new Promise((resolve, reject) => {
window.addEventListener('message', e => resolve(e));
window.addEventListener('messageerror', e => reject(new Error('received messageerror')));
});
} finally {
frame.remove();
}
}
promise_test(async () => {
let messageEvent = await addIframeAndReceiveMessage('resources/transfer-arraybuffer-to-parent.html');
assert_class_string(messageEvent.data, 'ArrayBuffer');
assert_array_equals(new Uint8Array(messageEvent.data), [42, 222]);
}, "cross-site windows can send transferred ArrayBuffer");
</script>
</body>