JavaScript Overview

JavaScript is an object-based scripting language, which is very popular and used to create dynamic and interactive web pages. Javascript is an interpreted language that is usually used with HTML, and programs written in JavaScript are called scripts which are lightweight.

Earlier JavaScript was named as LiveScript, but later Netscape changed its name to JavaScript because its origin was from Java which was very popular at that time. JavaScript made its first look with the release of Netscape 2.0 in 1995 with the name LiveScript.

Where is JavaScript being Used?

  • JavaScript can Interact with HTML DOM elements and dynamically control the webpage.
  • You can perform client-side validation using Javascript.
  • Using JavaScript, you can create drop-down menus, pop-up windows and dialog boxes.
  • JavaScript can be used to load asynchronous data without refreshing the webpage.
  • JavaScript can be used in game development.

Advantages of JavaScript

  • Speed: Being client-side scripting language, JavaScript is very fast since all of its code functions run immediately instead of letting it contact the server and wait for an answer.
  • Simplicity: JavaScript is relatively easy to learn and code.
  • Versatility: JavaScript acts nicely with other languages and also used in a massive variety of applications.
  • Server Load: Having in the client-side, it reduces the requirement on the website server.

Client and Server Side Scripting

A script is a set of instructions given in the form of codes. The instructions are designed either for the Web browser (client-side scripting) or the server (server-side scripting). Scripts provide change to a Web page.

The client is the structure or system on which the Web browser runs. JavaScript is the major client-side scripting language for the Web. Client-side scripts get interpreted by the browser. The server is where the Web page and other content reside. The server sends pages to the user/client on request. This single programming language facilitates this combine handling of client-server.