Sass is a stylesheet language that’s compiled to CSS. It allows you to use variables, nested rules, mixins, functions, and more, all with a fully CSS-compatible syntax. Sass helps keep large stylesheets well-organized and makes it easy to share design within and across projects.
If you’re looking for an introduction to Sass, check out the tutorial.
If you want to look up a built-in Sass function, look no further than the built-in module reference.
Or the Dart API documentation if you’re calling it from Dart.
Otherwise, use the table of contents for the language reference!