What does the '$' in CSS mean?

Question

I saw an animated project with a bunch of \'$\' in it. I have no idea what dollar signs are used for in CSS. I\'m guessing it is for animations. Here is a sample of some of the

Answer 1

$ initiates a variable in SASS which is a language extension that compiles to CSS (Similar to how CoffeeScript compiles to JavaScript) since CSS does not feature variables on its own.