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

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support461 Yes481 ? Yes ?
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidOpera AndroidiOS SafariSamsung Internet
Basic support ? ? ?481 ? ? ?

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

See also

Document Tags and Contributors

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