DOM - NamedNodeMap Object Project - length

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

Syntax

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

nodemapObject.length

Example

node.xml contents are as below −

<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>

Following example demonstrates the usage of the 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>

Execution

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

Length is : 1
dom_namednodemap_object.htm
Advertisements