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Summary

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

Syntax

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

// check that the attribute exists 
// before you set a value 
var d = document.getElementById("div1"); 
if (d.hasAttributeNS( 
        "https://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

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 Colaboradores desta página: fscholz, teoli, kscarfone, vishu_gawli, Sheppy, mattbasta, Mgjbot, Jabez, Nickolay, Dria, Callek, JesseW
 Última atualização por: fscholz,