General
What is TypeScript?
A typed superset of JavaScript that compiles to plain JavaScript.
Definition
TypeScript is a strongly-typed programming language built on JavaScript by Microsoft. It adds static type checking, interfaces, generics, enums, and other features that catch errors at compile time rather than runtime. TypeScript compiles to standard JavaScript and works everywhere JavaScript does. It's widely adopted in production — used by Angular, Vue 3, Next.js, Deno, and most modern frontend/backend projects.