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Is there a way, with Chrome DevTools, to see what’s going on in a BroadcastChannel other than attaching a message event listener to it, so that I could see who’s postMessage-ing what?

Is there a way, with Chrome DevTools, to see what’s going on in a BroadcastChannel other than attaching a message event listener to it, so that I could see who’s postMessage-ing what?

  • javascript
  • google-chrome
  • google-chrome-devtools
  • broadcast-channel
Share Improve this question edited Jan 29, 2021 at 9:04 Paolo 21.2k21 gold badges76 silver badges121 bronze badges asked Dec 18, 2019 at 18:01 Константин ВанКонстантин Ван 14.9k8 gold badges75 silver badges87 bronze badges 1
  • 2 No, there is none. – woxxom Commented Dec 19, 2019 at 4:31
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1 Answer 1

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The best solution I found was extending the prototype of postMessage like this:

(function(postMessage) {
  BroadcastChannel.prototype.postMessage = function (message) {
    debugger;

    postMessage.call(this, message);
  };
}(BroadcastChannel.prototype.postMessage));

You can obviously replace the debugger statement by something else like console.trace(message) for example, than you get the callstack directly printed in the console.

I hopes this helps you.

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