DOM - Node Object Attribute - previousSibling



The attribute previousSibling specifies the node immediately preceding the current node.

Syntax

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

nodeObject.previousSibling

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 previousSibling 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_previousSibling(p) {
            a = p.previousSibling;
            while (a.nodeType != 1) {
               a = a.previousSibling;
            }
            return a;
         }

         x = get_previousSibling(xmlDoc.getElementsByTagName("Email")[0]);
         document.write("Previous sibling of Email is : ");
         document.write(x.nodeName);
      </script>
   </body>
</html>

Execution

Save this file as nodeattribute_previoussibling.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 −

Previous sibling of Email is : ContactNo
dom_node_object.htm
Advertisements