CSS definitions, called selectors, can be embedded in the head part of a Web page where more technical bits are stowed, or put into a separate file that Web pages can reference, creating a central ...

Learn how cascading style sheets (CSS) work, and how they can help you properly create HTML page layouts that conform to industry best practices.

An often-overlooked website performance bottleneck occurs in processing cascading style sheets and the subsequent application of CSS selectors across a webpage's document object model. To speed up how ...