Difference between TypeScript and JavaScript

Nirmal Joshi
3 min readMay 18, 2021


JavaScript has been undoubtedly the standard programming language of the web browser. But while it is the inevitable result of any frontend work or backend development with Node.js, nowadays it is not every developer’s favorite building material.

Developers are turning to TypeScript as their go-to language for writing web applications.

Let’s check out TypeScript vs JavaScript comparison which will help you in understanding the difference in the simplest of ways!

JS directly runs in a browser or on a server in the case of Node.js(thanks to V8 JS engine!)

whereas TypeScript is a superset of JS. It needs to be compiled into JS to execute.

JavaScript is a scripting language supporting object-oriented programming language concepts.

TypeScript is a full-fledged object-oriented programming language.

JavaScript is liberal in data types though it supports all primitive types, whereas TypeScript is a strictly typed language.

JavaScript does not support features like generics and type annotations, Inference, Enums, and Interfaces whereas TypeScript has all these mentioned features.

JavaScript is comparatively more flexible in development time. Typescript’s core function is to eradicate development errors.

We can classify the JavaScript modules in two ways: Importing a module, Exporting a module. TypeScript has namespaces along with importing & exporting of modules as well.

JavaScript is a flexible and easy-to-learn scripting language. TypeScript rather has a stiff learning curve & requires prior scripting knowledge.

I am sure now you have a fair understanding about the differences between TypeScript & JavaScript. Generally, we see that bigger projects are managed well with Typescript language structure.

What do you think about TypeScript? Do let me know in the comments section.

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About me:

Founder and CEO of an IT company in India, I have more than 23+ years experience of dealing with people, processes, and codes. I started online training for my students when it was not in fashion and have trained more than 1000 students/working professionals personally which has helped them to secure awesome jobs or even start their own business.

I am also an active corporate trainer for several years now and have been consulting with top Fortune 500/1000 companies to streamline their development projects efficiently.

My goal is to share knowledge with a primary focus on advanced tools & techniques, projects, and standard programming practices to help my students understand the basics and fundamentals and make awesome technological implementations.



Nirmal Joshi

A founder and CEO of an IT company in India, I have more than 22+ years’ experience of dealing with people, processes and codes.