:root
The :root pseudo-class matches the root element of the document, usually the <html> element.
Overview
The :root pseudo-class matches the root element of the document, usually the <html> element.
Browser support
| Feature | Desktop | Mobile | ||||
|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Safari | Chrome Android | Safari iOS | |
| 1 | 12 | 1 | 1 | 18 | 1 | |
1+Supported (version) Not supported ※Has note Sub-feature descriptions sourced from MDN Web Docs (CC BY-SA 2.5)
Syntax
CSS
:root {
--color-primary: #3498db;
--spacing-md: 16px;
--font-base: 1rem;
}Live demo
Use cases
Using :root
The :root pseudo-class matches the root element of the document, usually the <html> element.
Cautions
- May not be supported in older browsers.
Accessibility
- Make sure visual changes are conveyed appropriately to assistive technology.
Related links
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