Question: I'm working on a codebase with multiple blocks of code setting some behavior on document.ready() (jQuery). Is there a way to enforce that one specific block is called before any of the others? 

Background:
I need to detect JS errors in an automated testing environment, so I need the code that starts logging JS errors to execute before any other JS code executes.

Answer: 
You should be able to use [holdReady](http://api.jquery.com/jQuery.holdReady/) to do this. As long as it is included before your ready events, you can run your own code and then trigger the other ready events.
You can execute the logging start code in DOMReady and other initialization in load. Or you could make your own initialization manager which calls your logging start code first and then all other initialization callbacks (provided that those are registered with your manager and not jQuery, unless you want to hack jQuery and extract them from there, which I don't advise).