Large projects with many programmers contributing can result in tangled code, but style guides like Idiomatic CSS offer a way out of the confusion.

HTML provides the structure, content and layout, CSS adds style and design, and JavaScript adds functionality and interactivity.

The most common programming languages on the Web include HyperText Markup Language, JavaScript, Cascading Style Sheets and PHP: Hypertext Preprocessor. Some are used in conjunction with each other ...