dom/messagechannel/tests/sharedWorker_messageChannel.js


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/* eslint-env worker */

onconnect = function(evt) {
  var mc = new MessageChannel();

  evt.ports[0].postMessage(42, [mc.port2]);
  mc.port1.onmessage = function(e) {
    mc.port1.postMessage(e.data);
  };
};