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<!DOCTYPE html>
<meta charset="utf-8">
<meta name="timeout" content="long">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script>
'use strict';
promise_test(t => {
return new Promise((resolve, reject) => {
document.addEventListener("visibilitychange", () => {
assert_true(document.hidden, "document is hidden");
window.addEventListener(
'deviceorientation',
event => {
if (document.hidden) {
reject();
} else {
resolve();
}
},
{ once: true });
}, { once: true });
});
}, 'Tests to check that deviceorientation events are not fired when the page is not visible.');
</script>
<p>Switch the page to the background, then switch back to it.</p>
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