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.

How TypeScript infers types based on runtime behavior. Variable Declarations. How to create and type JavaScript variables. TypeScript in 5 minutes. An overview of building a TypeScript web …

This tutorial provides a brief overview of TypeScript, focusing on its type system. Types by Inference. TypeScript knows the JavaScript language and will generate types for you in many …

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

TypeScript shares syntax and runtime behavior with JavaScript, so anything you learn about JavaScript is helping you learn TypeScript at the same time. There are many, many resources …

In this chapter, we’ll cover some of the most common types of values you’ll find in JavaScript code, and explain the corresponding ways to describe those types in TypeScript. This isn’t an …

An editor that supports TypeScript can deliver “quick fixes” to automatically fix errors, refactorings to easily re-organize code, and useful navigation features for jumping to definitions of a …

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 …

How TypeScript infers types based on runtime behavior. Variable Declarations. How to create and type JavaScript variables. TypeScript in 5 minutes. An overview of building a TypeScript web …