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<!DOCTYPE html>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/speculation-rules/prerender/resources/utils.js"></script>
<script>
assert_true(document.prerendering);
const params = new URLSearchParams(location.search);
const uid = params.get('uid');
async function requestIdleDetectionPermission() {
const bc = new PrerenderChannel('prerender-channel', uid);
try {
const _ = await IdleDetector.requestPermission();
bc.postMessage('unexpected success');
} catch (err){
bc.postMessage(err.name);
} finally {
bc.close();
}
}
requestIdleDetectionPermission();
</script>
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