tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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iframe_messageChannel_pingpong.html (775B)

      1 <!DOCTYPE HTML>
      2 <html>
      3 <body>
      4  <script type="application/javascript">
      5 
      6  function ok(what, msg) {
      7    window.parent.postMessage({type: what ? 'OK' : 'KO', msg }, '*');
      8  }
      9 
     10  window.addEventListener('message', receiveMessage);
     11  function receiveMessage(evt) {
     12    if (evt.data.type == 'PORT') {
     13      var port = evt.data.port;
     14      var counter = 0;
     15      port.onmessage = function(event) {
     16        if (counter++ == 0) {
     17          ok(!(event.data % 2), "The number " + event.data + " has been received correctly by the iframe");
     18 
     19          window.parent.postMessage({ type: 'PORT', port }, '*', [port]);
     20        }
     21        else {
     22          ok(false, "Wrong message!");
     23        }
     24      }
     25    } else {
     26      ok(false, "Unknown message");
     27    }
     28  }
     29 
     30  </script>
     31 </body>
     32 </html>