Importance of JavaScript: What is JavaScript and What are the Advantages of JavaScript?

importance of javascript

Importance of JavaScript: What is JavaScript and What are the Advantages of JavaScript?

Importance of JavaScript: What is JavaScript and What are the Advantages of JavaScript? 1200 628 Status200
In the IT world, there are hundreds of programming languages. Each programming language has its unique features despite most of them sharing the same syntax. Some of the programming languages are used for the frontend development of an application and others for the backend. There are very few languages that you can use for both purposes. JavaScript is one of them and it is the most versatile language that you can use as a programmer. The way this language has progressed throughout time is quite impressive and that’s why the importance of JavaScript is increasing over time.

You can have an idea for the JavaScript importance from the fact that there are almost 95% of websites all over the world that somehow use it in their development. That’s quite a figure that a programming language can possess and it’s remarkable. In this blog, we’ll thoroughly discuss the uses of JavaScript and its relative aspects. So, when we talk about JavaScript, the two main questions usually raised are: What is JavaScript, and what are the advantages of JavaScript? To provide you with a better understanding of the features of this language, we’ll start from the base.

History of JavaScript

The early 1990s was a significant time for the development of the internet. Browsers like Netscape and Microsoft competed. At that time, a Netscape programmer Brandan Eich created a scripting language right in September 1995. Due to the rapid growth of JavaScript in 1997, Netscape realized the need for proper management and source control of this language. For that reason, they assigned this task to the European Computer Manufacturers Association (ECMA) to create the specifications of this particular language.

From 1997 to 1999, ECMA provided three versions for JavaScript but the fourth version was not considered due to the clash of opinions regarding the features of the language that it had to offer. In 2005, there was a major development made for JavaScript as Ajax which is a revolutionary suite of technology considered JavaScript. Ajax dramatically enhanced the user experience by featuring websites as a native desktop application.

What is JavaScript?

JavaScript is a scripting language that you can use on both client-side and server-side for the development of dynamic web pages. Meanwhile, HTML and CSS build the structure of a website, JavaScript makes a website functional to entertain the end user’s interaction with the application. You can execute JavaScript code on any modern browser, that’s why we call it a scripting language. JavaScript works as a client-side and server-side scripting language, so we define it from both aspects.

JavaScript Importance as a Client-side Language

Since the start of JavaScript, it is known as the client-side language. It is one of the reasons to use JavaScript in web development. The HTML document supports its inclusion both in the form of an inline script and as a reference. Hence, the browser, later on, interprets it when it parses the DOM (Document Object Model). By using JavaScript, a web page can become dynamic by including the programs which enable and support the user’s interaction.

JavaScript allows the developers to create custom client-side scripts to integrate them into HTML. The JavaScript program is executed when the user has filled a form and it is going for submission to the server after validation of all the entries. Buttons, link navigation, pop-up boxes, and other features that allow the user to interact with an application are examples of JavaScript. Shortly put, traditionally, JavaScript acts as a gateway between the client (browser or a mobile app) and the server.

Use of JavaScript as Server-side Language

Today, the use of JavaScript is not only limited to the client-side to support user interaction but it has also become a full-stack web development framework due to its server-side scripting and development support. There are several JavaScript frameworks and libraries that we will discuss further that allow us to develop customized web applications. Now, JavaScript can deal with both client and server-side. Besides web applications, you can also use it in the development of fully functional mobile applications. That’s why JavaScript is finding huge development support and usage over the course of time.

If we specifically talk about the server-side feature of JavaScript, it is an extension in the language that allows it to deal with the database server and implementation of business logic within an application server. If you have an IT background, you’ll agree that these are the two fundamentals that every backend language needs to access. For server-side scripting, the JavaScript code runs on top of Chrome’s V8 engine that offers a non-blocking code execution. Meaning, any request that comes from the client-side will be handled asynchronously. Developers who are familiar with JavaScript syntax find the use of Node.js (a JS-based backend scripting library) quite easier. That is one of the primary reasons why Node.js is finding huge popularity in the devs’ communities.  

Considering the relation of a client-side and server-side script, both can communicate through an Application Programming Interface (API). The front end code is bound to client resources and can’t access the computing power. Meanwhile, the client-side cannot access the database and the business logic of the application.

What is the Use of JavaScript Program?

The JavaScript program is widely used in the software development domain. Each of its usages is unique in its own way. Meanwhile. It makes the development process quite easier and efficient due to the familiarity with the codebase that JavaScript has to offer. There are several uses of JavaScript if we generalize them, there are four basic uses:

Front end development: If you want to make a static website to dynamic, JavaScript is the best option that you have got. It is the easiest way to develop a dynamic web application containing multiple functions. One can use JavaScript in web apps to integrate API endpoints, communicate with the backend, and implementing dynamic responses ranging from client-side validations to beautiful popup modals.   

Backend Development: By using its several frameworks, today we can use a full-stack application through JavaScript. You can manipulate and handle the entire database operations, develop the business logic of an application, and also implement an API from scratch. That’s why they use of JavaScript in web development is increasing as it makes the development procedure quite easier.

Game Development: By using WebGL, you can make a fully functional browser-based game. Thanks to JavaScript library Three.js, developers can develop 3d simulations and games with ease which appeared to be quite complex in the recent past.

Mobile app development: With the introduction of Progressive Web Application (PWA) and Hybrid/Cross-platform Mobile application techniques, JavaScript has been exposed to a whole different community of mobile devs. React Native, Ionic, Phonegap, and Xamarin, all are employing the usage of JavaScript.

Reasons to Use JavaScript in Web Development

There are plenty of reasons to use JavaScript in web development. This language itself is so versatile that you can use it for both front-end and back-end development. Besides, the JavaScript program syntax is also easy to understand if we compare it with other programming languages. As you can use this language for front-end and back-end, so we have classified its advantages accordingly. So, from the two questions about the language: What is Javascript and what are the advantages of JavaScript? Now, we are going to answer the second part.

Advantages JavaScript in Front end

Following are the advantages of JavaScript in front-end development:


The main advantage of the use of JavaScript in front-end development is that it increases the interactivity of an application. It helps you to build some functional components that make the UI of a web application user friendly. All image sliders, pop-ups, site navigation menus, validations form, tabs, and all other components increase the interactivity of a website and it is all because of JavaScript. It updates the web pages dynamically without any reloading by allowing them to respond to user activity. You are only bound to your imagination while permitting interactivity in your app using JavaScript. The possibilities are endless.


No matter what the browser type is, JavaScript will always run clean and smooth. This gives developers a decent breathing room to express their implementation, without being too worried to handle or ponder for an application container’s compatibility. This brings the essence of cross-platform compatibility to JavaScript and one of the primary reasons why devs started using it to build not only web applications but also mobile apps as well.


The speed that JavaScript provides for the execution of different functions on a website is quite impressive. Once the code is executed on the client-side, it instantly performs the function and provides the results. When we use JavaScript as a client-side language, it doesn’t need any processing on the server as client-side processing always needs an end user’s resources. This brings efficiency for web and mobile applications.  

Advantages of JavaScript in back-end Development

Following are the advantages of JavaScript in back-end development:

Offline support

As a back-end language, JavaScript gives you the benefit over other programming languages by offering offline support. It supports the application even if there is not any internet connection. For that purpose, it uses the cached data to provide an interface to the user until the connectivity is back. This concept is widely being used in PWAs.


JavaScript increases the functionality of an application not just by the client-side programming but also the server-side. The functions you perform on screen are the result of the front end programming. Meanwhile, on the backend side, the JavaScript code also deals with the database and the business logic to make that operation possible to perform the function as per the requirement of a user-story. That’s how JavaScript increases the overall functionality of an application. Due to its functionality, the use of JavaScript in web development is also increasing.


Meanwhile, the frameworks of JavaScript are much lighter, so the code accessibility to the server is quite easy and smooth. It keeps the program inflow without any interruption of a software crash. Due to its better accessibility, you get the results even faster. Meanwhile, the overall performance of your application remains stable all the time.

Importance of JavaScript in Web development through its Frameworks

“One can easily count the total number of JavaScript frameworks, by counting his/her number of breaths in 24 hours”.

JavaScript has become the first choice of most of the developers in the world. Each framework provides a different set of functionalities. These frameworks are the reason for the importance of JavaScript in web development. So, we are presenting you with the top 3 frameworks that have changed the way of programming through JavaScript and played an important role in its development and popularity.

MEAN Stack

MEAN Stack is a collection of JavaScript technologies that we can use for web development. It stands for MongoDB, Express, Node.js, and AngularJS and these are the four components on which it is based. This framework makes JavaScript a full-stack development language, from the client to the server to the database. It means that you can develop a full-stack JavaScript application by using this framework.

Most of the developers use the MEAN stack for the development of cloud-hosted and SaaS-based applications. JavaScript was a popular language for front-end development but now due to these frameworks, it has become a better option for backend and database development. Meanwhile, MEAN uses the same languages with the same syntax that makes the development process quite easier. This Framework is Open source and is being widely used among the developers’ community to develop compute-intensive applications. 

MERN Stack

MERN stack is another framework that is becoming popular for web development through JavaScript. Just like MEAN stack is also a combination of technologies considering frameworks, libraries, and databases. It makes the development method for JavaScript even smoother. It also includes open source components: MongoDB, Express, React, and Node.js.

Every line of the code in the MERN stack is written in JavaScript. Frameworks like this have played a vital role to increase the importance of JavaScript. So, the MERN stack enables the JavaScript code to be used for both the front-end and back-end. To develop an application through the MERN stack, you only need expertise in JavaScript and MongoDB paradigms. Developers who learn MERN stack also find themselves in developing hybrid mobile applications.

MEVN Stack

It is another successful JavaScript framework that emerged with some latest methods to build a web application. It is also an open-source platform like the previous ones, so it allows you to implement a full-stack customized web application. For that purpose, it uses MongoDB, Express, Vue.js, and Node.js. It can play an important role to increase the functionality of any website for both front-end and back-end.

MEVN stack is quite an efficient framework that allows you to build an application through a JavaScript program. Its functionality increases the importance of JavaScript among developers. Besides this it allows easier methods to switch between client and server. Meanwhile, it is one of the best solutions for the development of real-time web applications that are already in demand.

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