jsFiddle lets developers play with the three core elements of Web development. Check out this powerful application for rapid prototyping and testing.

In this web development tutorial, we discuss the strengths and weaknesses of CSS-in-JS and provide code examples.

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.