The Element.prefix read-only property returns the namespace prefix of the specified element, or null if no prefix is specified.

Before DOM4 this API was defined within the Node interface.


string = element.prefix


The following logs "x" to the console.

<x:div onclick="console.log(this.prefix)"/>


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.


Specification Status Comment
The definition of 'Element.prefix' in that specification.
Obsolete Initial definition

Browser compatibility

We're converting our compatibility data into a machine-readable JSON format. This compatibility table still uses the old format, because we haven't yet converted the data it contains. Find out how you can help!

Feature Chrome Edge Firefox (Gecko) Internet Explorer Opera Safari
Basic support 46.0[1] (Yes) 48.0 (48.0)[1] ? (Yes) ?
Feature Android Edge Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
Basic support ? (Yes) 48.0 (48.0)[1] ? ? ?

[1] This API was previously available on the Node API.

See also

Document Tags and Contributors

Contributors to this page: erikadoyle, Sebastianz
Last updated by: erikadoyle,