Element: hasAttributeNS() method

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.

The hasAttributeNS() method of the Element interface returns a boolean value indicating whether the current element has the specified attribute with the specified namespace.

If you are working with HTML documents and you don't need to specify the requested attribute as being part of a specific namespace, use the hasAttribute() method instead.

Syntax

js
hasAttributeNS(namespace,localName)

Parameters

namespace

A string specifying the namespace of the attribute.

localName

The name of the attribute.

Return value

A boolean.

Examples

js
// Check that the attribute exists before you set a value
const d = document.getElementById("div1");
if (
  d.hasAttributeNS("http://www.mozilla.org/ns/specialspace/", "special-align")
) {
  d.setAttribute("align", "center");
}

Specifications

Specification
DOM
# ref-for-dom-element-hasattributens①

Browser compatibility

Report problems with this compatibility data on GitHub
desktopmobile
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
hasAttributeNS

Legend

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Full support
Full support

See also