Classes

See also TypeScript Classes cheatsheet.

Resources

• constructor in Mozilla docs.

Basic

class Greeter {
  abc = 123

  constructor(message) {
    this.message = message;
  }

  greet() {
    return `Hello, ${this.message}`;
  }
}

const greeter = new Greeter("World");
greet.greet()
// Hello, World!

Extending

class MyClass extends ParentClass {
  constructor() {
    super();
    // ...
  }

  foo(x) {
    // ...
  }
}

Object accessors

Setting up setters and getters and a class.

See JavaScript Object Accessors guide.

class Person {
  constructor() {
    this.language = 'n/a'
  }

  get lang() {
    return this.language
  }

  set lang(lang) {
    this.language = lang
  }
}

const p = new Person()

p
// Person { language: 'n/a' }

// Get
p.lang
// 'n/a'

// Set
p.lang = 'English'

p
// Person { language: 'English' }