TypeScript Academy · Lesson

TypeScript Classes and Constructors

Define classes with typed properties and constructors.

Welcome

TypeScript classes are JavaScript classes with type annotations. They combine data and behavior in a typed, object-oriented structure.

Declare class properties at the top of the class with their types. TypeScript checks all usages.

class Person {
  name: string;
  age: number;

  constructor(name: string, age: number) {
    this.name = name;
    this.age = age;
  }
}