We provide useful code review to our fellow Dev Wiki contributors. (We don't like bugs any more than you do!) We offer translation services for the code you'll find here. We spitball the future by suggesting newer ways of looking at long-standing coding issues. And we provide a useful training ground for many of the volunteers who go on to become members of our Volunteer Developer Program.
Keep a couple of points in your mind when you’re coding here at FANDOM.
Both CSS and JS can be either personal or site-wide. Personal code is that which affects your account only. Site-wide code applies to an entire wiki, such that all visitors will see its effect. Under FANDOM’s customization policy, not all code is allowed to be site-wide, whereas you can do whatever you want with personal code.