tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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unload-with-beacon.html (389B)


      1 <!DOCTYPE html>
      2 <script>
      3  // When told, register an unload handler that will trigger a beacon to the
      4  // URL given by the sender of the message.
      5  window.addEventListener('message', e => {
      6      var url = e.data;
      7      window.addEventListener('unload', () => {
      8          navigator.sendBeacon(url, 'blah');
      9      });
     10      window.parent.postMessage('navigate-away', '*');
     11  });
     12 </script>