Element.prefix - Web API 接口参考 编辑

Element.prefix 只读属性返回指定元素的命名空间前缀，如果未指定前缀，则返回null。

在DOM4之前，该API是在 Node  interface 中定义的。

Syntax

string = element.prefix

Examples

The following logs "x" to the console.

<x:div onclick="console.log(this.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 Element.prefix	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!

• Desktop
• Mobile

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

• Element.namespaceURI
• Element.localName
• Attr.prefix
• Node.prefix