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
Examples
Declaring global CSS variables
:root
can be useful for declaring global CSS variables:
:root {
--main-color: hotpink;
--pane-padding: 5px 42px;
}
Specifications
Specification | Status | Comment |
---|---|---|
Selectors Level 4The definition of ':root' in that specification. | Working Draft | No change. |
Selectors Level 3The 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 | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
:root
|
Chrome
Full support 1 |
Edge
Full support 12 |
Firefox
Full support 1 |
IE
Full support 9 |
Opera
Full support 9.5 |
Safari
Full support 1 |
WebView Android
Full support 37 |
Chrome Android
Full support 18 |
Firefox Android
Full support 4 |
Opera Android
Full support 14 |
Safari iOS
Full support 1 |
Samsung Internet Android
Full support 1.0 |
Legend
- Full support
- Full support
See also
:root by Mozilla Contributors is licensed under CC-BY-SA 2.5.