CSSNamespaceRule: namespaceURI property
Baseline
Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since March 2018.
The read-only namespaceURI property of the CSSNamespaceRule returns a string containing the text of the URI of the given namespace.
Value
A string 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.
css
@namespace url("http://www.w3.org/1999/xhtml");
js
const myRules = document.styleSheets[0].cssRules;
console.log(myRules[0].namespaceURI); // 'http://www.w3.org/1999/xhtml'
Specifications
| Specification |
|---|
| CSS Object Model (CSSOM) # dom-cssnamespacerule-namespaceuri |
Browser compatibility
| desktop | mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
namespaceURI
|
|
|
|
|
|
|
|
|
|
|
|
|
Legend
Tip: you can click/tap on a cell for more information.
- Full support
- Full support