XML DOM | Element Object getElementsByTagNameNS Method

XML DOM - Element Object getElementsByTagNameNS Method


Hello folks! welcome back to a new edition of our tutorial on XML DOM. In this tutorial, we will be discussing about the XML DOM Element Object getElementsByTagNameNS Method.

The getElementsByTagNameNS Method is used to return a NodeList of all descendant Elements with a given local name and the namespace URI in a document order.

Syntax

The following below is the syntax to use the getElementsByTagNameNS method -

elementObj.getElementsByTagNameNS(namespaceURI,  localName)

Parameter Details

S.No.Parameter & Description
1

namespaceURI

Is the namespace URI of elements to look for.

2

namespaceURI

Is either the local name of elements to look for or the special value "*", which matches all elements.


Return Value

This method returns a new NodeList object containing all the matched elements.

Example

Following are the node.xml contents -

<?xml version = "1.0"?>
<Company>
   <Employee xmlns:e = "http://www.webdesigntutorialz.com/technical/" category = "technical">
      <e:FirstName e:lang = "en">Kennedy</e:FirstName>
      <e:LastName>Nkpara</e:LastName>
      <e:ContactNo>1234567890</e:ContactNo>
      <e:Email>kennedynkpara@xyz.com</e:Email>
   </Employee>
   
   <Employee xmlns:n = "http://www.webdesigntutorialz.com/non-technical/" category = "non-technical">
      <n:FirstName n:lang = "en">Stephanie</n:FirstName>
      <n:LastName>Francis</n:LastName>
      <n:ContactNo>1234667898</n:ContactNo>
      <n:Email>stephaniefrancis@xyz.com</n:Email>
   </Employee>
</Company>


The below example illustrates the usage of Element Object getElementsByTagNameNS method -

<!DOCTYPE html>
   <head>
      <script>
         function loadXMLDoc(filename) {
            if (window.XMLHttpRequest) {
               xhttp = new XMLHttpRequest();
            } else // code for IE5 and IE6 {
               xhttp = new ActiveXObject("Microsoft.XMLHTTP");
            }
            xhttp.open("GET",filename,false);
            xhttp.send();
            return xhttp.responseXML;
         }
      </script>
   </head>
   <body>
      <script>
         xmlDoc = loadXMLDoc("/dom/node_ns.xml");
         ns="http://www.webdesigntutorialz.com/technical/";
         x = xmlDoc.getElementsByTagNameNS(ns, 'FirstName');
          document.write(x[0].nodeName); // returns: e:FirstName
      </script>
   </body>
</html>

Output

Save this file as elementmethod_getelementsbytagnamens.html on the server path (this file and node.xml should be on the same path in your server). This is going to give us the following output below -

e:FirstName


Alright guys! This is where we are going to be rounding up for this tutorial post. In our next tutorial, we will be studying about the Element Object hasAttribute Method.

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