A Designer’s Guide to Documenting Accessibility & User Interactions by Stéphanie Walter
Great documentation helps teams implement accessibility requirements the right way.
24 ways: Front-end Style Guides
Links to Style Guides
jQuery - YUI 3 Rosetta Stone
Very useful when scripting for Squarespace
Create a website style guide
How to Document Your Code
Billings | Developer Information
Useful list of variables and other info
Safari Web Content Guide
Handy reference for developing Web apps that run on Mobile Safari
Regular Expression Examples
Handy with good examples for webdev