dom/broadcastchannel/tests/broadcastchannel_worker_alive.js


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(new BroadcastChannel('foobar')).postMessage('READY');

(new BroadcastChannel('foobar')).addEventListener('message', function(event) {
  if (event.data != 'READY') {
    event.target.postMessage(event.data);
  }
}, false);