when do you use Object.defineProperty()

Question

I\'m wondering when I should use

Object.defineProperty

to create new properties for an object. I\'m aware that I\'m able to set things lik

Answer 1

Features like 'enumerable' are rarely used in my experience. The major use case is computed properties:

var myObj = {};

myObj.width = 20;
myObj.height = 20;

Object.defineProperty(myObj, 'area', {
    get: function() {
        return this.width*this.height;
    }
});
console.log(myObj.area);