Is there any way to prevent replacement of JavaScript object properties?

Question

I would like to make an object\'s structure immutable, preventing its properties from being subsequently replaced. The properties need to be readable, however. Is this possi

Answer 1

As mkoryak said, you can create a closure to hide properties

function Car(make, model, color) {
    var _make = make, _model = model, _color = color; 

    this.getMake = function() {
        return _make;
    }

}

var mycar = new Car("ford", "mustang", "black");

mycar.getMake(); //returns "ford"
mycar._make; //error