CSSNamespaceRule.namespaceURI

The read-only namespaceURI property of the CSSNamespaceRule returns a DOMString containing the text of the URI of the given namespace.

Syntax

var namespaceURI = CSSNamespaceRule.namespaceURI

Returns

A DOMString containing a URI.

Examples

The stylesheet includes a namespace as the only rule. Therefore the first CSSRule returned will be a CSSNamespaceRule. The value of the namespaceURI property will be http://www.w3.org/1999/xhtml.

@namespace url(http://www.w3.org/1999/xhtml);
let myRules = document.styleSheets[0].cssRules;
console.log(myRules[0].namespaceURI); //http://www.w3.org/1999/xhtml

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
namespaceURI
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/namespaceURI