TypeScript extends JavaScript by adding types to the language. TypeScript speeds up your development experience by catching errors and providing fixes before you even run your code.

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).

Jul 23, 2025 · The nullish coalescing (??) operator is a logical operator in TypeScript that returns its right-hand side operand if the left-hand side operand is null or undefined; otherwise, it …

This TypeScript tutorial helps you master TypeScript. You'll learn the ins and outs of TypeScript programming.

Jul 11, 2025 · TypeScript is a programming language that adds static type checking to JavaScript. TypeScript is a superset of JavaScript, meaning that everything available in JavaScript is also …

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 …

TypeScript is an open-source language maintained and developed by Microsoft. Basically, TypeScript adds additional syntax to JavaScript to support a tighter integration with your editor.

Aug 8, 2024 · TypeScript has become an industry standard for building large-scale applications, with many organizations choosing it as their primary language for application development. …

Dive into the chapters below to embark on your TypeScript journey. Each section offers tutorials, example code, exercises, and solutions to consolidate your understanding.