Can You Mix CSS and HTML?

Is it possible to mix HTML markup and CSS style sheets in the same document? And if the answer is yes, when is it a good idea to do so?

Is HTML Case Sensitive?

Do you want to know if tags and attributes in HTML are case insensitive? We have the answer for you, so read on.

How to Preview an HTML File

Learn how to preview an HTML document in your browser, as well as how to view the source code of that document in your text editor.