Attr.prefix

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

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
DOM Standard (DOM) # dom-attr-prefix

Browser compatibility

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	WebView Android	Chrome Android	Firefox for Android	Opera Android	Safari on IOS	Samsung Internet
`prefix`	1	12	1	9	≤12.1	1	1	18	4	≤12.1	1	1.0