https://github.com/web-platform-tests/wpt
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Tip revision: 3dadc0c18b5224dae634f59f54f6025cc9cdc17e authored by PhistucK on 03 November 2018, 12:16:45 UTC
HTML/events/beforeunload - respect preventDefault().
Tip revision: 3dadc0c
postMessage-helper.html
<script>(opener||parent).postMessage(isSecureContext, '*')</script>
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