1class ClassMates{
2	constructor(name,age){
3    	this.name=name;
4      	this.age=age;
5    }
6  	displayInfo(){
7    	return this.name + "is " + this.age + " years old!";
8    }
9}
10
11let classmate = new ClassMates("Mike Will",15);
12classmate.displayInfo();  // result: Mike Will is 15 years old!

1// Improved formatting of Spotted Tailed Quoll's answer
2class Person {
3	constructor(name, age) {
4		this.name = name;
5		this.age = age;
6	}
7	introduction() {
8		return `My name is ${name} and I am ${age} years old!`;
9	}
10}
11
12let john = new Person("John Smith", 18);
13console.log(john.introduction());

1class Rectangle {
2  constructor(height, width) {
3    this.height = height;
4    this.width = width;
5  }
6  // Getter
7  get area() {
8    return this.calcArea();
9  }
10  // Method
11  calcArea() {
12    return this.height * this.width;
13  }
14}
15
16const square = new Rectangle(10, 10);
17
18console.log(square.area); // 100

1//JavaScript class: Here a quick code example
2
3// Basic class
4class Rectangle {
5  
6  // Constructor
7  constructor(height, width) {
8    // Member variables
9    this.height = height;
10    this.width = width;
11
12    // Access static member variable
13    Rectangle.count++;
14  }
15  
16  // Getter
17  get area() {
18    return this.calcArea();
19  }
20  
21  // Method
22  calcArea() {
23    return this.height * this.width;
24  }
25
26  // Static method
27  static calcArea(width, height) {
28    return width * height;
29  }
30}
31
32// Static member variable
33Rectangle.count = 0;
34
35
36// Class instantiation
37const square = new Rectangle(10, 10);
38
39// Access member variable
40console.log(square.height, square.width); // 10 10
41
42// Call getter
43console.log(square.area);	// 100
44
45// Call method
46console.log(square.calcArea()); // 100
47
48
49// Access static member variable
50console.log(Rectangle.count); // 1
51
52// Call static method
53console.log(Rectangle.calcArea(15, 15));  // 225

1// unnamed
2let Rectangle = class {
3  constructor(height, width) {
4    this.height = height;
5    this.width = width;
6  }
7};
8console.log(Rectangle.name);
9// output: "Rectangle"
10
11// named
12let Rectangle = class Rectangle5 {
13  constructor(height, width) {
14    this.height = height;
15    this.width = width;
16  }
17};
18console.log(Rectangle.name);
19// output: "Rectangle2"
20

1class Rectangle {
2  constructor(hauteur, largeur) {
3    this.hauteur = hauteur;
4    this.largeur = largeur;
5  }
6}