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test: wait for beforeunload handler to be installed (#23874)

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Cheng Zhao 2020-06-02 11:32:39 +09:00 • committed by GitHub
parent fbf397e15d
commit 5918dd6e65
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7 changed files with 24 additions and 26 deletions
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14
spec-main/fixtures/api/beforeunload-empty-string.html Normal file
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<html>
<body>
<script type="text/javascript" charset="utf-8">
// Only prevent unload on the first window close
var unloadPrevented = false;
window.onbeforeunload = function() {
if (!unloadPrevented) {
unloadPrevented = true;
return '';
}
}
</script>
</body>
</html>