DOM - NodeList Object Attribute - length

The attribute length gives the number of nodes in the node list.

Syntax

Following is the syntax for the usage of the length attribute.

nodelistObject.length

Example

node.xml contents are as below −

<?xml version = "1.0"?>
<Company>
   <Employee category = "Technical">
      <FirstName>Tanmay</FirstName>
      <LastName>Patil</LastName>
      <ContactNo>1234567890</ContactNo>
      <Email>tanmaypatil@xyz.com</Email>
   </Employee>
   
   <Employee category = "Non-Technical">
      <FirstName>Taniya</FirstName>
      <LastName>Mishra</LastName>
      <ContactNo>1234667898</ContactNo>
      <Email>taniyamishra@xyz.com</Email>
   </Employee>
   
   <Employee category = "Management">
      <FirstName>Tanisha</FirstName>
      <LastName>Sharma</LastName>
      <ContactNo>1234562350</ContactNo>
      <Email>tanishasharma@xyz.com</Email>
   </Employee>
</Company>

The following example parses an XML document (node.xml) into an XML DOM object and extracts the length information using the length attribute.

<!DOCTYPE html>
   <body>
      <script>
         if (window.XMLHttpRequest) {
            xmlhttp = new XMLHttpRequest();
         } else {
            xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
         }
         xmlhttp.open("GET","/dom/node.xml",false);
         xmlhttp.send();
         xmlDoc = xmlhttp.responseXML;

         y = xmlDoc.getElementsByTagName('FirstName');
         document.write("Length of node list: " + y.length);
      </script>
   </body>
</html>

Execution

Save this file as nodeattribute_length.htm on the server path (this file and node.xml should be on the same path in your server). We will get the output as shown below −

Length of node list: 3
dom_nodelist_object.htm
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