Utilizing Chrome's Firebug technique for monitoring AJAX requests

I am facing a challenge with my google chrome extension as I attempt to monitor ajax requests while browsing the web. The only method I have found so far is to listen for the DOMSubtreeModified event. This event gets fired during every ajax event, but unfortunately does not provide any additional information about the request. However, in the Firebug google chrome extension, there is an extensive tracking system for ajax requests that includes many details. I attempted to understand how they accomplish this by looking at the source code, but I found it difficult to comprehend.

Does anyone know of a way to track these events and gather more details about the requests? Perhaps someone could study the techniques used in Firebug or share their knowledge on how it can be done?

javascriptajaxgoogle-chrome-extensionfirebuggoogle-chrome-devtools

Answer №1

If you're looking to debug AJAX requests using Chrome Developer Tools, there are a few helpful techniques:

  1. Check out the network tab to monitor all (AJAX) requests, along with their request and response headers.
  2. Enable XHR console logging by right-clicking in the Developer Tools console and selecting "Enable XMLHttpRequest logging".
  3. Create an XHR breakpoint for more detailed debugging.

In this scenario, DOM breakpoints aren't necessary. This method is most effective when your AJAX request involves changes to the DOM tree.

Answer №2

At the moment, there is no built-in method for retrieving comprehensive information about ajax requests that resembles the Network tab feature.

An experimental solution is available with 

chrome.experimental.webRequest.onCompleted.addListener
, which allows you to intercept ajax requests, access the returned response code (200, 404), and view some of the response headers. Keep in mind that accessing the response body is not supported with this method.

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