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 NamedNodeMap length Property.
The NamedNodeMap length property gives the number of nodes in the map. The range of the valid child node indices is 0 to length - 1 inclusive.
The NamedNodeMap length property gives the number of nodes in the map. The range of the valid child node indices is 0 to length - 1 inclusive.
Syntax
The following below is the syntax to use the NamedNodeMap length Property -
nodemapObject.length
Return Value
This property returns the number of nodes in the current map.
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 NamedNodeMap 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>
Output
Save this file as namednodemapproperty_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 is : 1
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 getNamedItem Method.
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Feel free to ask your questions where necessary and we will attend to them as soon as possible. If this tutorial was helpful to you, you can use the share button to share this tutorial.
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Thanks for reading and bye for now.