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Sass

CSS with superpowers

The most mature, stable, and powerful professional grade CSS extension language in the world. Adds variables, nesting, mixins, and more to CSS.

15K
GitHub Stars
supported
TypeScript
easy
Learning Curve
4.3
DX Score
Visit Website → Documentation GitHub

Pricing

Model
free
Free Tier
MIT licensed, fully open source

Features

  • ✓ Variables
  • ✓ Nesting
  • ✓ Mixins
  • ✓ Functions
  • ✓ Inheritance (@extend)
  • ✓ Partials and imports
  • ✓ Operators
  • ✓ Dart Sass (modern)

Pros

  • + Industry standard preprocessor
  • + Massive ecosystem
  • + Excellent documentation
  • + Powers Bootstrap and others
  • + Dart Sass is actively maintained

Cons

  • - Build step required
  • - CSS nesting now native
  • - Can lead to over-nesting
  • - Output can be bloated if misused

Best For

enterprise startup

Alternatives

PostCSS PostCSS Lightning CSS Lightning CSS
css preprocessor scss variables mixins