2. HTML We write HTML in files that end with the .html extension (like homepage.html). To write HTML and CSS code, you’ll want to install a code editor. Nowadays, one of the most popular free ...

Also in Visual Studio Code 1.66, the built-in CSS extension now ships with a code formatter, implemented by the js-beautify library, that works with CSS, LESS, and CSS.

The design site CSS-Tricks has their own guide for learning HTML and CSS—but they’ve compiled plenty of alternatives into a wide-ranging but approachable list.