TypeScript vs JavaScript: The Top 11 Differences You Should Know

TypeScript vs JavaScript: The Top 11 Differences You Should Know

TypeScript or JavaScript? You often seen developers contemplating between these two. JavaScript has been market leader for many years and has become a popular scripting language in the developers' community. A superset of JavaScript, TypeScript offers all of the features of JavaScript with some added features. 


JavaScript, often abbreviated as JS, is a scripting language that is one of the core technologies of the World Wide Web, alongside HTML and CSS. As of 2023, 98.7% of websites use JavaScript on the client side for webpage behavior, often incorporating third-party libraries. 


TypeScript is a strongly typed programming language that builds on JavaScript, giving you better tooling at any scale.  It is designed for the development of large applications and transpiles to JavaScript. TypeScript adds syntax on top of JavaScript, allowing developers to add types.

TypeScript vs JavaScript: The Differences

TypeScript and JavaScript are two harmonizing technologies that are driving both front-end and back-end development. Let us now look at detailed comparison of TypeScript and JavaScript.

First release

Created by
Netscape(Brendan Eich)
TypingStrongly Typed. TypeScript supports both static and dynamic typing.Loosely typed. In JavaScript, only dynamic typing is supported, not static typing.
Compiled into JavaScript.Does not need a compilation.
Learning Curve you should have a basic understanding and knowledge of JavaScript Easy-to-learn scripting language
Annotationrequires the need for annotation to get the full advantage of TypeScript features.Does not require annotation.
IDE supportExtensive validation and refactoring capabilitiesLimited validation and refactoring capabilities
Error DetectionErrors are detected or highlighted in the early development stage in TypeScript.Errors are detected only at the run time, since it is an interpreted language.
Executiondoes not run directly on the browser.Runs directly on the browser and supports cross-platform, cross browsers.
Suitable Forsuited for complex applications and also any JS applications as wellIdeally used for web applications, mobile and desktop applications, and game development.
UsersSlack, Tech Stack Bitpanda, MediumNetflix, Microsoft, PayPal, Google etc.

Conclusion: TypeScript vs JavaScript

In the end, after all these head-to head comparison both are good in their own ways. Both have pros and cons. TypeScript and JavaScript complement each other perfectly. If you are know JavaScript, then it’s easy for you to understand TypeScript. They both languages share the same syntax and run-time behavior.