HTML and CSS Reference
Figure 1.12. The Super HTML5 Editor application that you'll learn to build in chapter 3 uses the designMode
attribute and the Editing DOM API to allow users to edit HTML markup using a set of rich-text editing controls.
The toolbar in this screenshot allows you to use Bold, Italic, Underline, Strikethrough, List, Link, and Image
formatting commands on the contents of the area below the toolbar.