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 |
|---|---|---|
| DOM The definition of 'Attr: prefix' in that specification. |
Living Standard | |
| DOM4 The definition of 'Attr.prefix' in that specification. |
Obsolete |
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.
Update compatibility data on GitHub
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
prefix | Chrome
Full support
46
| Edge Full support ≤18 | Firefox
Full support
48
| IE ? | Opera Full support Yes | Safari Full support Yes | WebView Android Full support Yes | Chrome Android ? | Firefox Android
Full support
48
| Opera Android Full support Yes | Safari iOS Full support Yes | Samsung Internet Android ? |
Legend
- Full support
- Full support
- Compatibility unknown
- Compatibility unknown
- See implementation notes.
- See implementation notes.