testing/web-platform/tests/html/browsers/the-window-object/support/noopener-target.html


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<!DOCTYPE html>
<script>
  var channelName = location.search.substr(1);
  var channel = new BroadcastChannel(channelName);
  channel.postMessage({ name: window.name,
                        haveOpener: window.opener !== null });
  window.close();
</script>