javascript what is a class code example
Example 1: js class
class Car {
constructor(brand, speed) {
this.brand = brand
this.speed = speed
}
speedUp() {
this.speed += 5
console.log(`The ${this.brand} is travelling at ${this.speed} mph`)
}
slowDown() {
this.speed -= 5
console.log(`The ${this.brand} is travelling at ${this.speed} mph`)
}
}
const redCar = new Car('toyota', 0)
redCar.speedUp()
redCar.slowDown()
Example 2: javascript create class
class Person {
constructor(name, age) {
this.name = name;
this.age = age;
}
present = () => {
console.log(`Hi! i'm ${this.name} and i'm ${this.age} years old`)
}
}
let me = new Person("tsuy", 15);
me.present();
Example 3: javascript classes
class Rectangle {
constructor(height, width) {
this.height = height;
this.width = width;
}
get area() {
return this.calcArea();
}
calcArea() {
return this.height * this.width;
}
}
const square = new Rectangle(10, 10);
console.log(square.area);
Example 4: variables in js class
constructor(){
this.foo = bar
}