The Attr.prefix read-only property returns the namespace prefix of the specified attribute, or null if no prefix is specified.
Before DOM4 this API was defined within the Node interface.
Syntax
string = attribute.prefix
Examples
The following logs "x" to the console.
<div x:id="example" onclick="console.log(this.attributes[0].prefix)"/>
Notes
This will only work when a namespace-aware parser is used, i.e. when a document is served with an XML MIME type. This will not work for HTML documents.
Specifications
| Specification | Status | Comment |
|---|---|---|
| DOM4 The definition of 'Attr.prefix' in that specification. |
Obsolete | Initial definition |
Browser compatibility
The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
| Feature | Chrome | Edge | Firefox | Internet Explorer | Opera | Safari |
|---|---|---|---|---|---|---|
| Basic support | 461 | Yes | 481 | ? | Yes | ? |
| Feature | Android webview | Chrome for Android | Edge mobile | Firefox for Android | Opera Android | iOS Safari | Samsung Internet |
|---|---|---|---|---|---|---|---|
| Basic support | ? | ? | ? | 481 | ? | ? | ? |
1. This API was previously available on the Node API.