What is TypeScript?

TypeScript is an open source programming language developed by Microsoft. It is a superset of JavaScript, and it enables programmers to write object-oriented programs in JavaScript. TypeScript is also used to develop transpiler, which converts TypeScript to JavaScript. It is designed to develop larger applications. TypeScript was developed as per the proposal of ECMAScript standard. TypeScript has features such as classes, modules, and an arrow function syntax, as proposed in ECMAScript 6 standard.