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<!DOCTYPE html>
<meta charset="utf-8">
<title>Beforeunload must be gated behind sticky activation: destination page</title>
<p>If you reached this page without clicking through a confirmation dialog, then the test has passed!
<script>
if (window.opener) {
window.opener.postMessage('navigated successfully');
} else if (window.parent) {
window.parent.postMessage('navigated successfully');
}
</script>