Implicit Accessors in JavaScript?

Question

In ColdFusion (a server-side language), it's possible to have CF generate any getters and setters in a class for you, like so:

component output="false" accessors="true" {

    property string title;

    public any function init() output = false {

        setTitle("");
        return this;

    }

}

Here, I never write the setTitle() setter, it's just implicit.

Is there any such thing for JavaScript (or even jQuery) in either ES5 / ES6 / ES7?

Answer 1

You can assign arbitrary properties to any object without explicitly writing setters/getters.

Although you can use them if you like.

function myClass() {}

Object.defineProperty(myClass.prototype, "bar", {
  get: function get_bar() {
    return this._bar;
  },
  set: function set_bar(value) {
    this._bar = value;
    alert(value);
  }
});

var instance = new myClass();
instance.foo = "123"; // Arbitary
instance.bar = "456"; // Explicit setter/getter
console.log(instance.foo, instance.bar);