The CSSNamespaceRule.prefix read-only property returns a DOMString with the name of the prefix associated to this namespace. If there is no such prefix, returns null.
var prefix = CSSNamespaceRule.prefix
A DOMString containing the prefix associated to this namespace.
| Specification | Status | Comment |
|---|---|---|
| CSS Object Model (CSSOM) The definition of 'namespaceURI' in that specification. | Working Draft | Initial definition. |
| Desktop | ||||||
|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | |
| Basic support | 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 |
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https://developer.mozilla.org/en-US/docs/Web/API/CSSNamespaceRule/prefix