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.
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.
:root
can be useful for declaring global CSS variables:
Specification |
---|
Selectors Level 4 # root-pseudo |
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | |
:root |
1 | 12 | 1 | 9 | 9.5 | 1 | 37 | 18 | 4 | 14 | 1 | 1.0 |
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https://developer.mozilla.org/en-US/docs/Web/CSS/:root