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 length Property.
The length property returns the number of nodes in the node list.
The length property returns the number of nodes in the node list.
Syntax
The following below is the syntax to use the length Property -
nodelistObject.length
Return Value
This property returns the number of nodes in the node list.
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>[email protected]</Email> </Employee> <Employee category = "Non-Technical"> <FirstName>Stephanie</FirstName> <LastName>Francis</LastName> <ContactNo>1234667898</ContactNo> <Email>[email protected]</Email> </Employee> <Employee category = "Management"> <FirstName>Justice</FirstName> <LastName>Dauglas</LastName> <ContactNo>1234562350</ContactNo> <Email>[email protected]</Email> </Employee> </Company>
The below example is used to parse an xml document (node.xml) into XML DOM object, and extracts the length information making use of the length property -
<!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>
Output
Save this file as nodeproperty_length.html on the server path (this file and node.xml should be on the same path in your server). This gives us the following output below -
Length of node list: 3
Alright guys! This is where we are going to be rounding up for this tutorial post. In our next tutorial, we will be studying about XML DOM item Method.
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Thanks for reading and bye for now.
