CSS & CSS3: 20 Lessons to Successful Web Development

Introduction to CSS

         To view the accompanying video for this lesson, please visit mhprofessional.com/nixoncss/.

When CSS was invented it was based around a Document Object Model (DOM), a means of separating out all the different elements within a web page into discrete objects, each with its own properties and values. This led logically to the introduction of style sheets, enabling the content of a web page to be completely separated from its styling; it also made HTML documents easily modifiable by languages such as JavaScript to provide ...