This is one way to create a class in JavaScript

JSCreateClass1

function car(model, year, color){
    this.model=model;
    this.color=color;
    this.year=year;
    
    this.getInfo=function(){
        return this.model + " | " + this.year + " | " + this.color;
    };
};

var myCar=new car("Citroen C4","2012","negro");
console.log(myCar.getInfo());