Language

TypeScript — Typed JavaScript

JavaScript with types — catch bugs before they happen and write clearer, safer code. The language used in Angular and large React apps.

16 lessons4 chaptersStart: What is TypeScript? →

1TypeScript Basics

What is TypeScript?25 min Setting Up & Compiling30 min Basic Types: string, number, boolean, array30 min Special Types: any, unknown, union & literal35 min Type Inference: TypeScript Guesses For You25 min Typing Functions35 min

2Describing Shapes

Interfaces: Describing an Object Shape35 min Type Aliases & the type Keyword30 min Optional and readonly Properties30 min Enums: Named Sets of Constants30 min Tuples: Fixed-Length, Typed Lists30 min

3Power Features

Typed Classes40 min Generics: Reusable Typed Code40 min Narrowing: typeof and in Type Guards35 min Modules & tsconfig.json35 min

4Project

Project: A Fully Typed Shopping Cart120 min