Dynamically Modifying Style and Cascading Style Sheets

Abstract

In Chapter 1, I stressed the importance of separating your markup, behavior, and presentation. The problem with separating everything is that many aspects of the three layers overlap or even collide in an explosion messed-up code. You’ve already seen how to manipulate the DOM document structure in Chapter 3 and the behavioral event listeners in Chapter 4. Now it’s time to discuss the presentation layer and how you can write scripts to modify your presentation. We’ll explore ways to modify the presentation without embedding it in the script itself, though sometimes doing so will be unavoidable.