class in javascript

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!

1class Person {
2 constructor(name, age) {
3   this.name = name;
4   this.age = age;
5 }
6  present = () => { //or present(){
7  	console.log(`Hi! i'm ${this.name} and i'm ${this.age} years old`) 
8  }
9}
10let me = new Person("tsuy", 15);
11me.present();
12// -> Hi! i'm tsuy and i'm 15 years old.

1class Person {
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
11const Anthony = new Person('Anthony', 32);

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());

1
2let myCar1 = new Car("Ford", 2014);
3
4let myCar2 = new Car("Audi", 2019);
5 

1class Car {
2    constructor(name, year) {
3        this.name = name;
4        this.year = year;
5    }
6    age(x) {
7        return x - this.year;
8    }
9}
10
11let date = new Date();
12let year = date.getFullYear();
13
14let myCar = new Car("Ford", 2014);
15document.getElementById("class1").innerHTML = "My car is " + myCar.age(year) + " years old.";