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CSSNamespaceRule

This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The CSSNamespaceRule interface describes an object representing a single CSS @namespace at-rule. It implements the CSSRule interface, with a type value of 10 (CSSRule.NAMESPACE_RULE).

Syntax

The syntax is described using the WebIDL format.

interface CSSNamespaceRule : CSSRule {
    readonly attribute DOMString namespaceURI;
    readonly attribute DOMString? prefix;
};

Properties

As a CSSRule, CSSNamespaceRule also implements the properties of that interface. It has some specific properties:

CSSNamespaceRule.namespaceURI
Returns a DOMString containing the text of the URI of the given namespace.
CSSNamespaceRule.prefix
Returns a DOMString with the name of the prefix associated to this namespace. If there is no such prefix, returns null.

Methods

As a CSSRule, CSSNamespaceRule also implements the methods of that interface. It has no specific methods:

Specification

Specification Status Comment
CSS Object Model (CSSOM)
The definition of 'CSSNamespaceRule' in that specification.
Working Draft Initial definition.

Browser compatibilityUpdate compatibility data on GitHub

Desktop
Chrome Edge Firefox Internet Explorer Opera Safari
Basic support 47 Yes 59 No 36 ?
namespaceURI 47 12 59 No 36 ?
prefix 47 12 59 No 36 ?
Mobile
Android webview Chrome for Android Edge Mobile Firefox for Android Opera for Android iOS Safari Samsung Internet
Basic support 47 47 Yes 59 36 ? 5.0
namespaceURI 47 47 Yes 59 36 ? 5.0
prefix 47 47 Yes 59 36 ? 5.0

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