Element: hasAttributeNS() method

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 is a string specifying the namespace of the attribute.
  • localName is 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 Standard
# ref-for-dom-element-hasattributens①

Browser compatibility

desktopmobile
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
hasAttributeNS

See also