TypeScript is a programming language that extends JavaScript with static type checking and other features. TypeScript aims to make JavaScript more reliable, readable, and maintainable by catching errors early and enforcing best practices. TypeScript also allows developers to use the latest JavaScript features and syntax, such as classes, modules, arrow functions, and decorators. TypeScript compiles to plain JavaScript that can run on any browser or platform.
TypeScript is developed and maintained by Microsoft and has a large and active community of users and contributors. TypeScript is used by many popular frameworks and libraries, such as Angular, React, Vue, NestJS, and RxJS. TypeScript is also compatible with existing JavaScript code and tools, such as Babel, Webpack, ESLint, and Jest.