Element.hasAttributeNS()

Summary

hasAttributeNS returns a boolean value indicating whether the current element has the specified attribute.

Syntax

JavaScript
result =
element.hasAttributeNS(
namespace,
localName) 
  • result is the boolean value true or false.
  • namespace is a string specifying the namespace of the attribute.
  • localName is the name of the attribute.

Example

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

Notes

DOM methods dealing with element's attributes:

Not namespace-aware, most commonly used methods Namespace-aware variants (DOM Level 2) DOM Level 1 methods for dealing with Attr nodes directly (seldom used) DOM Level 2 namespace-aware methods for dealing with Attr nodes directly (seldom used)
setAttribute (DOM 1) setAttributeNS setAttributeNode setAttributeNodeNS
getAttribute (DOM 1) getAttributeNS getAttributeNode getAttributeNodeNS
hasAttribute (DOM 2) hasAttributeNS - -
removeAttribute (DOM 1) removeAttributeNS removeAttributeNode -

Specification

DOM Level 2 Core: hasAttributeNS

License

© 2016 Mozilla Contributors
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-us/docs/web/api/element/hasattributens

API DOM Element Élément Method Reference Référence