What is Dart Sass?
Dart Sass is the primary implementation of Sass, which means it gets new features before any other implementation. It's fast, easy to install, and it compiles to pure JavaScript which makes it easy to integrate into modern web development workflows. Find out more or help out with its development on GitHub.
Is Ruby Sass deprecated?
With the release of Dart Sass 1.0.
What is the difference between node Sass and Dart Sass?
Node Sass supports the same API as this package and is also faster (although it's usually a little slower than Dart Sass). However, it requires a native library which may be difficult to install, and it's generally slower to add features and fix bugs.