XML DOM | firstChild Attribute

XML DOM - firstChild Attribute


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 firstChild attribute.

The XML DOM firstChild attribute specifies the first child of a node.

Syntax

The following below is the syntax to use the firstChild attribute -

nodeObject.firstChild

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 the firstChild attribute -

<!DOCTYPE html>
<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;

         function get_firstChild(p) {
            a = p.firstChild;
            while (a.nodeType!=1) {
               a = a.nextSibling;
            }
            return a;
         }

         x = get_firstChild(xmlDoc.getElementsByTagName("Employee")[0]);
         document.write("First child is : ");
         document.write(x.nodeName);
      </script>
   </body>
</html>

Output

Save this file as nodeattribute_firstchild.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 -

First child is : FirstName


Alright guys! This is where we are going to be rounding up for this tutorial post. In our next tutorial, we are going to be discussing about XML DOM lastChild Attribute.

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