CSSNamespaceRule

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.

@namespace url("http://www.w3.org/1999/xhtml");

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

Specifications

• CSS Object Model (CSSOM)