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.

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# …

By understanding how JavaScript works, TypeScript can build a type-system that accepts JavaScript code but has types. This offers a type-system without needing to add extra …

The goal of TypeScript is to be a static typechecker for JavaScript programs - in other words, a tool that runs before your code runs (static) and ensures that the types of the program are …

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 with JavaScript This is when you use an editor which uses TypeScript to provide tooling like auto-complete, jump to symbol and refactoring tools like rename.

You will need a copy of Node.js as an environment to run the package. Then you use a dependency manager like npm, yarn or pnpm to download TypeScript into your project.

JavaScript only truly provides dynamic typing - running the code to see what happens. The alternative is to use a static type system to make predictions about what the code is expected …

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

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.