javascript - Find the source of an XMLHttpRequest using Chrome dev tools

Question

I'm trying to debug a web application not written by me. There is a failing XMLHttpRequest being made:

XMLHttpRequest cannot load ... No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin '...' is therefore not allowed access. 

Is there a way, preferably using Chrome developer tools, to locate the source of this call?

question from:https://stackoverflow.com/questions/23097817/find-the-source-of-an-xmlhttprequest-using-chrome-dev-tools

Answer 1

It turns out - yes, there is. That "XHR Breakpoints" option on the side which I had always ignored:

It works perfectly.