11 KiB
| title | chunk | source | category | tags | date_saved | instance |
|---|---|---|---|---|---|---|
| CSS - Glossary | MDN | 1/3 | https://developer.mozilla.org/en-US/docs/Glossary/CSS | reference | web, html, css, javascript, documentation | 2026-05-05T05:26:26.538347+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
CSS (Cascading Style Sheets) is a declarative language that controls how webpages look in the browser. The browser applies CSS style declarations to selected elements to display them properly. A style declaration contains the properties and their values, which determine how a webpage looks. CSS is one of the three core Web technologies, along with HTML and JavaScript. CSS usually styles HTML elements, but can be also used with other markup languages like SVG or XML. A CSS rule is a set of properties associated with a selector. Here is an example that makes every HTML paragraph yellow against a black background: "Cascading" refers to the rules that govern how selectors are prioritized to change a page's appearance. This is a very important feature, since a complex website can have thousands of CSS rules.