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| title | introduction |
|---|---|
| Documentation | Sass is a stylesheet language that’s compiled to CSS. It allows you to use [variables](/documentation/variables), [nested rules](/documentation/style-rules#nesting), [mixins](/documentation/at-rules/mixin), [functions](/documentation/modules), 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. |
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If you're looking for an introduction to Sass, check out the tutorial.
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If you want to look up a built-in Sass function, look no further than the built-in module reference.
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If you're calling Sass from JavaScript, you may want the JS API documentation.
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Or the Dart API documentation if you're calling it from Dart.
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Otherwise, use the table of contents for the language reference!
Older Versions
This documentation is written for the most recent version of the Sass language. If you're using Dart Sass {{ releases['dart-sass'].version }}, you'll have access to all the features described here. But if you're using an older version of Dart Sass or a deprecated Sass implementation like LibSass or Ruby Sass, there may be some behavioral differences.
Anywhere behavior differs between versions or implementations, the documentation includes a compatibility indicator like this:
{% compatibility 'dart: true', 'libsass: "3.6.0"', 'ruby: false', 'feature: "Feature Name"' %}{% endcompatibility %}
Implementations with a "✓" fully support the feature in question, and implementations with a "✗" don't support it all. Implementations with a version number started supporting the feature in question at that version. Implementations can also be marked as "partial":
{% compatibility 'dart: true', 'libsass: "partial"', 'ruby: false' %} Additional details go here. {% endcompatibility %}
This indicates that the implementation only supports some aspects of the feature. These compatibility indicators (and many others) have a "▶" button, which can be clicked to show more details about exactly how the implementations differ and which versions support which aspects of the feature in question.