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 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.
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