navigator-keyboardLock.https.html
<!DOCTYPE html>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script>
'use strict';
promise_test(() => {
const p = navigator.keyboardLock(['a', 'b']);
assert_true(p instanceof Promise);
return p;
}, 'Keyboard Lock keyboardLock');
</script>