This code snippet is used in ES6 Classes JavaScript Tutorial on SFDC Stop

classes-part-3.js

class Car {

    #color

    constructor(name, speed, color) {
        this.name = name;
        this.speed = speed;
        this.#color = color;
    }

    showSpeed() {
        console.log(this.speed);
    }

    showColor() {
        console.log(this.#color);
    }
}

let audi = new Car('audi', 300, 'red');
audi.showSpeed();
console.log(audi.name);
console.log(audi.speed);
// console.log(audi.#color);
audi.showColor();