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<!DOCTYPE html>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="utils.js"></script>
<script src="deferred-promise-utils.js"></script>
<script>
const params = new URLSearchParams(location.search);
// The main test page (restriction-broadcast-channel.html) loads the initiator
// page, then the initiator page will prerender itself with the `prerendering`
// parameter.
const isPrerendering = params.has('prerendering');
if (!isPrerendering) {
loadInitiatorPage();
} else {
const prerenderEventCollector = new PrerenderEventCollector();
// Create separate channels as a sender channel cannot receive a message sent
// by itself.
const sender = new BroadcastChannel('test');
const receiver = new BroadcastChannel('test');
const promise = new Promise(resolve => {
receiver.onmessage = e => {
prerenderEventCollector.addEvent(`received message: ${e.data}`);
resolve();
};
});
sender.postMessage('hello');
prerenderEventCollector.start(promise, 'BroadcastChannel');
}
</script>
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