TypeScript is an open source programming language developed and maintained by Microsoft. It is a superset of JavaScript, and facilitates writing object-oriented programming. It should be compiled with JavaScript to run on any browser.
TypeScript provides the greatest tooling and advanced autocompletion, navigation, and refactoring. It is used to develop the JavaScript application for the client side and server side. With classes, modules, and interfaces, we can build robust components using TypeScript.
The main advantage it provides over JavaScript is that it enables compile time type checking for errors. Unexpected runtime errors can be avoided due to casting issues. Also, it provides syntactic sugar for writing object-oriented programming.