10 KiB
| title | chunk | source | category | tags | date_saved | instance |
|---|---|---|---|---|---|---|
| CSS preprocessor - Glossary | MDN | 1/3 | https://developer.mozilla.org/en-US/docs/Glossary/CSS_preprocessor | reference | web, html, css, javascript, documentation | 2026-05-05T05:26:39.207715+00:00 | kb-cron |
MDN HTML HTML: Markup language
HTML reference
HTML guides
Markup languages
CSS reference
CSS guides
Layout cookbook
JavaScriptJS JavaScript: Scripting language
JS reference
JS guides
Web APIs Web APIs: Programming interfaces
Web API reference
Web API guides
- Using the Web animation API
- Using the Fetch API
- Working with the History API
- Using the Web speech API
- Using web workers
Technologies
Topics
Learn Learn web development
Frontend developer course
- Getting started modules
- Core modules
- MDN Curriculum
- Check out the video course from Scrimba, our partner
Learn HTML
Learn CSS
Learn JavaScript
Tools Discover our tools
About Get to know MDN better
CSS preprocessor
A CSS preprocessor is a program that lets you generate CSS from the preprocessor's own unique syntax. There are many CSS preprocessors to choose from, however most CSS preprocessors will add some features that don't exist in pure CSS, such as mixin, nesting selector, inheritance selector, and so on. These features make the CSS structure more readable and maintainable. To use a CSS preprocessor, you must install a CSS compiler on your web server, or use the CSS preprocessor to compile on the development environment, and then upload compiled CSS file to the web server.