DOM - Node Object Method - hasChildNodes


Advertisements

The method hasChildNodes returns whether this node has any children. This method returns true if the current node has child nodes otherwise false.

Syntax

Following is the syntax for the usage of the hasChildNodes method.

nodeObject.hasChildNodes()

This method returns boolean true value if node has any child, false otherwise.

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>

Following example demonstrates the usage of the hasChildNodes 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.xml");

         y = xmlDoc.getElementsByTagName("Employee")[0];
         document.write("Checks for the existence of child node : ");
         document.write(y.hasChildNodes());
      </script>
   </body>
</html>

Execution

Save this file as nodemethod_haschildnodes.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 −

Checks for the existence of child node : true
dom_node_object.htm

Useful Video Courses


Video

Decision Trees, Random Forests, AdaBoost & XGBoost in R

33 Lectures 3.5 hours

Abhishek And Pukhraj

Video

SEO Secrets of Google: Expired Domains & 301 Redirects

15 Lectures 1 hours

Zach Miller

Video

Mental Freedom: From PAIN To POWER

15 Lectures 4 hours

Prof. Paul Cline, Ed.D

Video

Mental Freedom: Freedom From Pain

13 Lectures 4 hours

Prof. Paul Cline, Ed.D

Video

JavaScript DOM Game - Deal making game using JavaScript only

17 Lectures 2 hours

Laurence Svekis

Advertisements