:root
Baseline Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.
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 (0-1-0) is higher than html's (0-0-1).
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/* Selects the root element of the document: <html> in the case of HTML */ :root { background: yellow; } Syntax
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:root { /* ... */ } Examples
Declaring global CSS variables
:root can be useful for declaring global CSS variables:
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:root { --main-color: hotpink; --pane-padding: 5px 42px; } Specifications
| Specification |
|---|
| Selectors Level 4 # root-pseudo |