Hi all!

Sometimes during spdevelopment you may need to dig into OOB SharePoint javascript files and look how they work. As you may know, under layouts folder in 14 hive there are also debug versions of javascript files. When you are debugging you solution in visual studio by pressing F5 it might automatically replace standard js files with it debug versions, so you can set up breakpoint in OOB js files and try to debug. But what if you aren’t using F5 debugging, or want to force SharePoint to load debug versions in all site collections by default? You have two options here.

One option is to modify web.config for particular web application, so all sites under this web app will be automatically load debug versions of javascript files (and this is pretty cool for developer machine). You need to modify compilation tag and set attribute debug to true as on screenshot below:

so, before this action your scripts look like follows: