<!DOCTYPE html>
<canvas id="pcanvas" width="320" height="320">
This is a canvas.
</canvas>
<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 requestPointerLock(){
const bc = new PrerenderChannel('prerender-channel', uid);
try {
const canvas = document.getElementById('pcanvas');
const _ = await canvas.requestPointerLock();
bc.postMessage('unexpected success');
} catch (err){
bc.postMessage(err.name);
} finally {
bc.close();
}
}
requestPointerLock();
</script>