TypeScript vs JavaScript

Posted September 9, 2022 by Rohith and Anusha ‐ 1 min read

JavaScript is the most popular programming language of HTML and the Web. JavaScript is an object-based scripting language which is lightweight and cross-platform. TypeScript is an open-source pure object-oriented programing language. It is a strongly typed superset of JavaScript which compiles to plain JavaScript.

It doesn’t support strongly typed or static typing.It supports strongly typed or static typing feature.
Netscape developed it in 1995.Anders Hejlsberg developed it in 2012.
JavaScript source file is in .js extension.TypeScript source file is in .ts extension.
It is directly run on the browser.It is not directly run on the browser.
It is just a scripting language.It supports object-oriented programming concept like classes, interfaces, inheritance, generics, etc.
It doesn’t support optional parameters.It supports optional parameters.
It is interpreted language that’s why it highlighted the errors at runtime.It compiles the code and highlighted errors during the development time.
JavaScript doesn’t support modules.TypeScript gives support for modules.
In this, number, string are the objects.In this, number, string are the interface.
JavaScript doesn’t support generics.TypeScript supports generics.
quick-references blog typescript javascript differences

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