CSS Custom Properties (also known as Variables) is a big win for front-enddevelopers. It brings the power of variables to CSS, which results in lessrepetition, better readability and more flexibility.Plus, unlike variables from CSS preprocessors, CSS Variables are actually a partof the DOM, which has a lot of benefits. So they’re essentially like SASS andLESS variables on steroids. In this article, I’ll give you a crash course on howthis new technology works.I’ve also created a free and

Source : Learn CSS Variables in 5 minutes – A tutorial for beginners