Apply types to your JavaScript project incrementally, each step improves editor support and improves your codebase. Let's take this incorrect JavaScript code, and see how TypeScript …

Examples in Each Chapter Our "Try it Yourself" editor makes it easy to learn TypeScript. You can edit TypeScript code and view the result in your browser.

The TypeScript compiler, named tsc, is written in TypeScript. As a result, it can be compiled into regular JavaScript and can then be executed in any JavaScript engine (e.g. a browser).

TypeScript is a language for application-scale JavaScript. TypeScript adds optional types to JavaScript that support tools for large-scale JavaScript applications for any browser, for any …

Sep 4, 2025 · This TypeScript tutorial provides you with a step-by-step learning journey for mastering TypeScript. You will start with TypeScript fundamentals, and then move on to …

Type Safety Prevent runtime errors with compile-time checks. TypeScript makes your code safer and more predictable.

TypeScript Documentation Get Started Quick introductions based on your background or preference. TS for the New Programmer TypeScript for JS Programmers TS for Java/C# …

TypeScript is an open-source programming language that builds on top of JavaScript. It works on any web browser, any OS, and any environment that JavaScript runs.

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

These introductions are intended to highlight key similarities and differences between TypeScript and your favored programming language, and clear up common misconceptions specific to …