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CSSNamespaceRule

The CSSNamespaceRule interface describes an object representing a single CSS @namespace at-rule.

CSSRule CSSNamespaceRule

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(http://www.w3.org/1999/xhtml);

js

let myRules = document.styleSheets[0].cssRules;
console.log(myRules[0]); //a CSSNamespaceRule

Specifications

Browser compatibility

Desktop Mobile
Chrome Edge Firefox Internet Explorer Opera Safari WebView Android Chrome Android Firefox for Android Opera Android Safari on IOS Samsung Internet
CSSNamespaceRule 47 12 53 9 36 10.1 47 47 53 36 10.3 5.0
namespaceURI 47 12 59 9 36 10.1 47 47 59 36 10.3 5.0
prefix 47 12 59 9 36 10.1 47 47 59 36 10.3 5.0

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https://developer.mozilla.org/en-US/docs/Web/API/CSSNamespaceRule