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).
The syntax is described using the WebIDL format.
interface CSSNamespaceRule : CSSRule {
readonly attribute DOMString namespaceURI;
readonly attribute DOMString? prefix;
};
As a CSSRule, CSSNamespaceRule also implements the properties of that interface. It has some specific properties:
CSSNamespaceRule.namespaceURIDOMString containing the text of the URI of the given namespace.CSSNamespaceRule.prefixDOMString with the name of the prefix associated to this namespace. If there is no such prefix, returns null.As a CSSRule, CSSNamespaceRule also implements the methods of that interface. It has no specific methods:
| Specification | Status | Comment |
|---|---|---|
| CSS Object Model (CSSOM) The definition of 'CSSNamespaceRule' in that specification. | Working Draft | Initial definition. |
| 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