Write CSS using javascript

This article is for beginners and is going to show how to write some CSS for a website using a javascript file instead of a cascading style sheet file. The javascript will be just at a basic level – nothing complicated.

A unstyled button but with Gutenberg enabled the block library tries to take over:: http://royemory.com/wp-includes/css/dist/block-library/style.min.css?ver=5.0.2