You can edit the source code and content also parallelly. The source code is formatted using the code mirror library.
Create and edit the valid HTML code simply! You don't worry about the HTML syntax to format your text content. The WYSIWYG editor (left side view) provided the toolbar to make format text and insert images, tables, and more options.
The content editing works bi-directional, you can write the HTML code on the right-side view (code view), and changes will reflect in the WYSIWYG editor.
This sample explains how to create a live HTML editor application using Rich Text Editor.