What is JavaScript used for?

By | October 1, 2021
What is JavaScript used for

Want to know What is JavaScript used for? It is one of the most popular programming languages that can be used as both server-side and client-side. It allows you to create interactive web pages. HTML and CSS provide structure and style to your web page, but it adds an interactive element to your web page that keeps the customer engagement. There are many live examples that you might use in daily life, like the Amazon search box and many other functionalities.

What is JavaScript used for?

With the help of JavaScript, you can turn a static page into an interactive page. It will allow you to add behavior to your webpage. You can consider it to be the third layer after HTML and CSS.



We will how JavaScript has evolved over the years. It was all started in 1993 with the introduction of the first commercial-like browser by Netscape Communications Corporation. It was designed to improve information sharing.

  • To expand it further, Netscape Communications Corporation created JavaScript, whose goal was to create dynamic web.
  • In 1995, Brendan Eich developed JavaScript.
  • In 1996, Netscape submitted JavaScript to ECMA International, and the official release was done in 1997.
  • ECMAScript was the official name for the language.
  • In 1996,
  • After 2015, the ECMAScript is named by year (ECMAScript 2015), and so on.
  • ES6 (ECMAScript 2015) comes with all browser support.
  • ES7 (ECMAScript 2016) comes with Chrome and Opera support.
  • From 2016 to 2019, a new version of ECMAScript was published every year.
  • New updates are still going on.


  • It allows you to extend the interactive features and interfaces to web applications, including animations, videos, audios, and other modern web experiences.
  • It works faster as it is executed at the client’s device rather than the website’s server, and it will minimize the server requests.
  • Today almost all browsers come with JIT compilation for JavaScript, which reduces the time for code compilation before executing it.
  • It can be easily included in the webpage. You can use JavaScript for different applications as it shows support for languages like PHP and Pearl.
  • The code is easy to learn, handle, and debug due to its flexible syntax and can be used inside other languages’ scripts.


No language comes with perfection, and JavaScript is no exception. Below are some disadvantages-

  • The code is visible in the browser as the code of JavaScript is added explicitly to the webpages, and it can be reused.
  • The code can be vulnerable to malicious code injection and cross-site scripting. It allows hackers to alter the code of the web page to make them function differently. You may not always detect the attack.
  • If the user has disabled the JavaScript extension for the browser, then the code does not work.
  • It does not work with old browsers.

Working of JavaScript on your webpage

Whenever you load a webpage in your browser, code will run in the execution environment. It takes the code as input and results in a webpage. Then the JavaScript will modify the HTML and CSS to enhance the user interface dynamically. The code should be executed in the same order in which it appears on the page; otherwise, the page will get impacted.

JavaScript tools and Framework

If you are learning any language it is a good practice to know about its tools, frameworks, IDE, and existing libraries. Using all these you can excel and can work on improving the webpage.

  • Framework- it is a platform that offers a standard way to develop applications. JavaScript has some frameworks like Node, Electron, Angular, BackBone.
  • Library- these are a form of files that offers you different functionality to perform some specific task. JavaScript has some libraries like jQuery, React, Socket.io, Bootstrap.
  • Tools- they provide assistance in order to make the application smooth and efficient. JavaScript has some tools like JSLint, Mocha, Browserify.
  • IDE- an IDE is a development environment that allows you to generate native code as well as managed code. Some commonly used IDE for JavaScript are- WebStorm, Atom, Microsoft Visual Studio, NetBeans, etc.

Where is JavaScript used?

  • Allow you to create web and mobile applications.

Most of the developers use the JavaScript framework to develop and build mobile as well as web applications. This framework comes with the JavaScript code libraries that allow the developers to use the pre-written code to create a more creative webpage. Some of the popular frameworks are- React, React Native, Angular, and Vue. Still, many of the companies are using Node.js as a Javascript runtime environment like LinkedIn, Paypal, Uber, etc.

  • Allow you to add interactive behavior to your webpage.

Once you are into JavaScript, there is no limit to what you can do with it. There are many features that you can add to your webpages to make it interactive with the customers. Here are some examples that you can consider- changing button colors on hover, zoom in and out with a click or mouse hover, displaying animations, using different menus, including image carousel, embedding audio, and video within your webpage. These are a few examples, but you can explore more options and features that will make the website more attractive.

  • Allow you to build web server and server applications.

The use of JavaScript is not only limited to the development of websites and applications. You are allowed to create simple web servers and develop the complete back-end infrastructure with the Node.js help. Once you are done with the server creation, you can then deploy server applications using JavaScript.

  • Allow you to develop games.

With the help of JavaScript, you can even develop browser games. JavaScript framework provides Ease JS library that provides an easy solution to work with rich graphics to make your game more interactive. The Ease JS also has 2D bitmaps that allow rendering the target for transformation.

  • Allow you to create Smartwatch applications.

It has covered almost every field for the development of applications. It provides you with the Pebble JS library, which is used for the smartwatch application development. But it works for the applications that will use the internet for its functioning. You can create applications for several watches using JavaScript.

  • Statistics

Below statistics can reflect the number which denotes the popularity of the JavaScript. It is estimated that more than 32000+ developers are actively supporting the use of JavaScript. More than 94% of the websites work on JavaScript.


We have seen tremendous growth in the use of JavaScript over the years. It has changed the way how we used to interact with the web and technology. It is a universal language and has set the standards for web interactivity.

It is also claimed if you want to enter the IT field thenit can be the easiest way. It has a special syntax which is easy to learn, understand, and implement. It can be the base language to learn any other language. It works well with other languages and can be easily integrated with others. So get started with JavaScript now and take out your innovation on your webpage.

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