Java Script Tutorial - For Beginners & Professionals

Defining Namespace or Nested Objects in JavaScript

JavaScript is a dynamic language. You can create objects on the fly, and objects can contain other objects, also it does not support the concept of namespace like C#.

 

Understanding Prototype in JavaScript

JavaScript is a prototype-based programming language which has no class like as C++, C#, Java etc. JavaScript uses functions as classes. Hence, in JavaScript we can define a class name Student as given below-

 

Understanding Local and Global Variables in JavaScript

Like other programming languages, JavaScript also has local and global variables. But the declaration and scope of a variable in JavaScript is different from others programming languages. In this article, I am going to explain the difference between local and global variables in JavaScript.

 

JavaScript Email Address validation using Regular Expression

We can validate email address at client side and server side. To validate email address on client side, we can use java script with regular expression. Java script can check the regular expression pattern for valid email address. We have different regular expression patterns for validating email address.

 

Convert string to xml and xml to string using javascript

Sometimes we need to parse xml into string and string into xml. Different browsers parse xml to string and vice-versa in different ways. Here, I am sharing cross browser compatible methods to parse xml.

 

Restrict user to enter numeric value in textbox using javascript

Due to some reasons (like don’t allow to enter chars in Price TextBox), we restrict users to enter chars in TextBox. We can implement this functionality by using below method.