We all know that mess that grows in CSS, JavaScript and HTML files. There is no compilers as in static typed programming languages that will keep you from doing that mess bu there are Clean Code standards.
The team working on files should keep common standard and follow best practices. It is a failure if each team member has his own preferences and style and writes his parts with his own conventions. WordPress recommendation is:
"All code in any code-base should look like a single person typed it, no matter how many people contributed." – Principles of Writing Consistent, Idiomatic JavaScript
WordPress has its standards. Due to its opensource nature these are vital to keep an order in their web templates and sources. I follow most of their recommendations:
Looks OK! 