TypeScript vs JavaScript What’s the Difference between JavaScript and TypeScript

If you’ve ever worked on projects of web development, you’ve probably seen JavaScript. JavaScript is now the most popular scripting language for many web-based projects.

TypeScript is an open-source programming language suitable for large applications. It was developed in 2012 by Microsoft, the main purpose of developing TypeScript is that because the code of JavaScript was becoming more complex when it comes to large-scale web applications.

So, if you change the JavaScript (.js) extension to TypeScript (.ts), it will work the same way. But that doesn’t mean JavaScript and TypeScript are the same.

Before discussing the differences between TypeScript vs JavaScript, let’s understand what every language looks like!


JavaScript is one of the most popular basic programming languages for the web. From the beginning, it has been an integral part of web applications that make web pages dynamic and interactive. 

In the JavaScript language, programs are called scripts. Scripts are written in HTML pages and executed automatically with page load. It is executed and provided plain text and doesn’t require special compilation or preparation to execute.

It is a high-level language. For a long, JS was used for client-side implementation, but some newer JS engines also have a server-side implementation.

Features of JavaScript:

  • Server Communication: JavaScript provides the option to verify user input before sending it to the server.
  • Quick Response: In JavaScript, changes can be done in real-time. So programmers don’t have to reload pages to see the changes they’ve made.
  • Better User Interaction: User experiences can be made more enjoyable by creating an interface where the button generates a response when we click on it. Like loading, the animation starts on the button.
  • Support cross-platform: JavaScript is Dynamic, flexible, and supports the cross-platform.

Complete Guide about JavaScript


TypeScript is a modern version of JavaScript. Language is designed to write simple and clear code for huge web applications. Typescript can be easily configured in JavaScript without any problems.

But you can’t run TypeScript directly in a browser like JavaScript. First, it needs to be converted to JavaScript code, and then it can be run in a browser.

TypeScript follows the object-oriented language structure and has features like classes, inheritance, namespace, and interface. So, if you are working on a large application, using TypeScript may be a good option, it is very easy to deploy with any JavaScript application and has more features.

Static typing is also possible with typeScript (string, boolean, and number) in TypeScript

For example:

class employee
   private age: number;

Why TypeScript was created while having JavaScript?

JavaScript was developed as a client-side language. But after a while, people realized that it also has the potential to be used as a server-side.

But, the problem arises, when large applications were developed, the code was very dense and complex.

Therefore, JavaScript fails to fulfill its role as an object-oriented language and prevents it from succeeding at the organizational level as a server language. So, to fill this gap, TypeScript was developed.

Features of TypeScript:

  • TypeScript code is converted to JavaScript to make it understandable for browsers: Browsers cannot understand a single word of TypeScript code, so the written code is compiled and then converted to JavaScript code so that the browsers can easily understand and use it. This process is called trans-piled.
  • TypeScript code used anywhere: Any operating system, browser, or device can easily run typeScript code. The code is not specific to any operating system or engine.
  • JavaScript to TypeScript: Converting code from JavaScript to TypeScript is very easy. Just need to change the extension from .js to .ts, a javascript code type is converted to TypeScript code type.
  • Library Support: TypeScript supports the JS library so that developers can easily access JavaScript libraries and they don’t need to create libraries separately for TypeScript.

Difference between JavaScript and TypeScript:

TypeHigh level interpreted programming languagePowerful Object-oriented programming language
Created byBrenden Eich at NetscapeAndres Hejlsberg at Microsoft
Heavyweight/LightweightHeavyweight than TypeScript.Lightweight interpreted programming language
File Extensions.js.tsx, .ts
Static TypingNot Supported static typingTypeScript support static typing
Client/Server-sideCan be used both client-side and server-sideMostly used for client-side.
ModulesJavaScript doesn’t Support ModulesTypeScript Support Modules
CompilationDoes not need any compilationNeed a compiler to compile the TypeScript code
InterfaceIt doesn’t have any interface.It has an interface
CommunityJavaScript is an old and widely used language, therefore has a huge community of programmers.TypeScript is not too old, So it has a small community as compared to JavaScript.
EnterprisesInstagram, AirbnbAsana, Clever


In this guide I have tried my best to explain the analysis about TypeScript vs JavaScript, I hope you like it.

Finally, it can be said that both JavaScript and TypeScript have advantages and disadvantages. JavaScript is not a complete coding language. It is used with HTML to improve the quality of web pages and make them dynamic. 

TypeScript, on the other hand, compiles in JS code, wherever it can be used. Still, TypeScript comes with more features, so it’s gaining popularity day by day and being used by a huge community of peoples. 

It is constantly getting improvements, and new features, therefore, making it secure for future use.