TypeScript pour débutants

TypeScript ajoute le typage statique à JavaScript pour un code plus robuste.

Types de base

let name: string = "Code & Chill";
let age: number = 42;
let isActive: boolean = true;
let tags: string[] = ["react", "typescript"];
 

Interfaces

interface User {
  id: number;
  name: string;
  email: string;
  role?: "admin" | "user";
}

const user: User = {
  id: 1,
  name: "John",
  email: "john@example.com"
};
 

Fonctions typées

function add(a: number, b: number): number {
  return a + b;
}

const multiply = (a: number, b: number): number => a * b;