XML DOM | isDefaultNamespace Method

XML DOM - isDefaultNamespace Method


Hello folks! welcome back to a new edition of our tutorial on XML DOM. In this tutorial, we are going to be studying about the XML DOM isDefaultNamespace Method.

The XML DOM isDefaultNamespace method accepts a namespace URI as argument and returns true if the namespace is the default namespace on the given node otherwise it returns false.

Syntax

The following below is the syntax to use the isDefaultNamespace Method -

nodeObject.isDefaultNamespace(namespaceURI)

Parameter Details

S.No.Parameter & Description
1

namespaceURI

It is a String representing the namespace against which the element will be checked.


Return Value

This method returns true if the namespace is the default namespace on the given node or false if not.

Example

Following below are the node.xml contents -

<?xml version = "1.0"?>
<Company>
   <Employee category = "Technical">
      <FirstName>Kennedy</FirstName>
      <LastName>Nkpara</LastName>
      <ContactNo>1234567890</ContactNo>
      <Email>kennedynkpara@xyz.com</Email>
   </Employee>
   
   <Employee category = "Non-Technical">
      <FirstName>Stephanie</FirstName>
      <LastName>Francis</LastName>
      <ContactNo>1234667898</ContactNo>
      <Email>stephaniefrancis@xyz.com</Email>
   </Employee>
   
   <Employee category = "Management">
      <FirstName>Justice</FirstName>
      <LastName>Dauglas</LastName>
      <ContactNo>1234562350</ContactNo>
      <Email>justicedauglas@xyz.com</Email>
   </Employee>
</Company>


The following example illustrates the usage of the isDefaultNamespace method -

<!DOCTYPE html>
<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");
         x = xmlDoc.getElementsByTagName('Employee');
         document.write("<b>Namespace URI of Employee node is:</b> "+x.item(0).attributes[0].namespaceURI);
         var uri = "http://www.webdesigntutorialz.com/technical/";
         y = xmlDoc.getElementsByTagNameNS(uri,'FirstName')[0];
         document.write("<br><b>isDefaultNamespace:</b> ");
         document.write(y.isDefaultNamespace(uri));
      </script>
   </body>
</html>

Output

Save this file as nodemethod_isDefaultNamespace.html on the server's path (this file and node.xml should be on the same path in your server). This gives us the following output below -

Namespace URI of Employee node is: http://www.w3.org/2000/xmlns/
isDefaultNamespace: false 


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 XML DOM isEqualNode Method.

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Thanks for reading and bye for now.