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CSSNamespaceRule - Web APIs | MDN
CSSNamespaceRule
Baseline
Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since April 2017.
The CSSNamespaceRule interface describes an object representing a single CSS @namespace at-rule.
Instance properties
Inherits properties from its ancestor CSSRule.
CSSNamespaceRule.namespaceURI-
Returns a string containing the text of the URI of the given namespace.
CSSNamespaceRule.prefix-
Returns a string with the name of the prefix associated to this namespace. If there is no such prefix, returns an empty string.
Instance methods
Inherits methods from its ancestor CSSRule.
Examples
The stylesheet includes a namespace as the only rule. Therefore the first CSSRule returned will be a CSSNamespaceRule.
css
@namespace url("https://www.w3.org/1999/xhtml");
js
const myRules = document.styleSheets[0].cssRules;
console.log(myRules[0]); // A CSSNamespaceRule
Specifications
| Specification |
|---|
| CSS Object Model (CSSOM) # the-cssnamespacerule-interface |
Browser compatibility
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