Getting Started with TypeScript

August 8, 2026

getting-startedtypescript

TypeScript adds type safety to JavaScript. You write types, the compiler catches errors before runtime, and your code becomes easier to understand and maintain.

Basic Types

Start with simple types: strings, numbers, booleans, and arrays. TypeScript infers many of these from your values, but you can also write them out:

let name: string = "Alice";
let age: number = 30;
let active: boolean = true;
let tags: string[] = ["react", "typescript"];

Interfaces and Objects

Group related data with interfaces. They define the shape of objects and make it clear what properties your code expects:

interface User {
  name: string;
  age: number;
  email?: string;
}

function getUser(user: User): string {
  return `${user.name} (${user.age})`;
}

The `?` after `email` means it's optional - users can exist without an email address.