XML DOM | NamedNodeMap length Property

XML DOM - NamedNodeMap length Property


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 NamedNodeMap length Property.

The NamedNodeMap length property gives the number of nodes in the map. The range of the valid child node indices is 0 to length - 1 inclusive.

Syntax

The following below is the syntax to use the NamedNodeMap length Property -

nodemapObject.length

Return Value

This property returns the number of nodes in the current map.

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 below illustrates the usage of NamedNodeMap length Property -

<!DOCTYPE html>
<html>
   <body>
      <script>
         if (window.XMLHttpRequest) {// code for IE7+, Firefox, Chrome, Opera, Safari
            xmlhttp = new XMLHttpRequest();
         } else {// code for IE6, IE5
            xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
         }
         xmlhttp.open("GET","/dom/node.xml",false);
         xmlhttp.send();
         xmlDoc = xmlhttp.responseXML;

         x = xmlDoc.getElementsByTagName("Employee");
         document.write("Length is : ");
         document.write(x.item(0).attributes.length);
      </script>
   </body>
</html>

Output

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

Length is : 1


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 getNamedItem Method.

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