TypeScript is JavaScript with syntax for types. TypeScript is a strongly typed programming language that builds on JavaScript, giving you better tooling at any scale.

Find TypeScript starter projects: from Angular to React or Node.js and CLIs.

The Playground lets you write TypeScript or JavaScript online in a safe and sharable way.

Download TypeScript TypeScript can be installed through three installation routes depending on how you intend to use it: an npm module, a NuGet package or a Visual Studio Extension. If …

The Handbook The TypeScript Handbook is intended to be a comprehensive document that explains TypeScript to everyday programmers. You can read the handbook by going from top …

TypeScript doesn’t use “types on the left”-style declarations like int x = 0; Type annotations will always go after the thing being typed. In most cases, though, this isn’t needed. Wherever …

TypeScript stands in an unusual relationship to JavaScript. TypeScript offers all of JavaScript’s features, and an additional layer on top of these: TypeScript’s type system. For example, …

TypeScript takes tooling seriously, and that goes beyond completions and errors as you type. An editor that supports TypeScript can deliver “quick fixes” to automatically fix errors, refactorings …

The relationship between TypeScript (TS) and JavaScript (JS) is rather unique among modern programming languages, so learning more about this relationship will help you understand …

TypeScript Cheat Sheets Downloadable syntax reference pages for different parts of everyday TypeScript code Learn more about Classes, Interfaces, Types and Control Flow Analysis …