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The :root CSS pseudo-class matches the root element of a tree representing the document. In HTML, :root represents the <html> element and is identical to the selector html, except that its specificity is higher.
/* Selects the root element of the document:
<html> in the case of HTML */
:root {
background: yellow;
}
Syntax
:root
Example
:root can be useful for declaring global CSS variables:
:root {
--main-color: hotpink;
--pane-padding: 5px 42px;
}
Specifications
| Specification | Status | Comment |
|---|---|---|
| Selectors Level 4 The definition of ':root' in that specification. |
Working Draft | No change. |
| Selectors Level 3 The definition of ':root' in that specification. |
Recommendation | Initial definition. |
Browser compatibility
The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
Update compatibility data on GitHub
| Desktop | Mobile | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Basic support | Chrome Full support 1 | Edge ? | Firefox Full support 1 | IE Full support 9 | Opera Full support 9.5 | Safari Full support 1 | WebView Android ? | Chrome Android ? | Edge Mobile Full support Yes | Firefox Android ? | Opera Android ? | Safari iOS ? | Samsung Internet Android ? |
Legend
- Full support
- Full support
- Compatibility unknown
- Compatibility unknown
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