The CSSNamespaceRule.namespaceURI read-only property returns a DOMString containing the text of the URI of the given namespace.
var namespaceURI = CSSNamespaceRule.namespaceURI
A DOMString containing a URI.
| Specification | Status | Comment |
|---|---|---|
| CSS Object Model (CSSOM) The definition of 'namespaceURI' in that specification. | Working Draft | Initial definition. |
| Feature | Chrome | Edge | Firefox (Gecko) | Internet Explorer | Opera | Safari (WebKit) |
|---|---|---|---|---|---|---|
| Basic support | 47 | (Yes) | ? | ? | ? | ? |
| Feature | Android | Android Webview | Edge | Firefox Mobile (Gecko) | Firefox OS | IE Mobile | Opera Mobile | Safari Mobile | Chrome for Android |
|---|---|---|---|---|---|---|---|---|---|
| Basic support | No support | 47 | (Yes) | ? | ? | ? | ? | ? | 47 |
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https://developer.mozilla.org/en-US/docs/Web/API/CSSNamespaceRule/namespaceURI