I want to be able to break on postmessage in Chrome Developer Tools, but it appears there's no such option:
Is it possible to conveniently break on postmessage without specifically searching the line in source code?
Edit: Someone suggested the question is a duplicate of this post: Any good debugger for HTML5 Javascript postMessage API?
The answer features Firebug extension, however, Firebug is no longer available (https://blog.getfirebug.com/)
If you are using the browser's console, you can run debug(window.postMessage)
there to make the execution stop when the next postMessage call is made.