Crib sheet for prototyping in JS

Guitar Prototyping

function Guitar(make, year, sound){
    this.make = make;
    this.year = year;
    this.sound = sound;
    this.playChord = function(){
        alert(this.sound);
    }
};
    
var anduril = new Guitar("Fender Squier", 1985, "Brang!");

anduril.playChord();
    
alert(anduril.make);
    
Guitar.prototype.changeMake = function(make){
    this.make = make;
}
        
anduril.changeMake("Gibson");
    
alert(anduril.make);

Guitar.prototype.model = function(model){
    this.model = model;
}
    
anduril.model("Bullet");

alert(anduril.model);

anduril.playChord();