Get Getter Function in Javascript

javascript setter getter getter-setter
Van Coding picture Van Coding · Jan 27, 2011 · Viewed 7.6k times · Source

In JavaScript there is the possibility to create getters and setters the following way:

function MyClass(){
 var MyField;
 this.__defineGetter__("MyField",function(){
  return MyField;
 });
 this.__defineSetter__("MyField",function(value){
  MyField = value;
 });
}

But is there a way to get the Getter or Setter FUNCTION? I think of something like this:

var obj = new MyClass();
obj.__getSetter__("MyField")("MyValue");

I need such a functionality when extending base classes. For example: Class "A" has field "a", Class "B" extends from "A" and also wants to have a field "a". To pass values from the "a"-field of a "B"-object to the "a"-field of a "A"-object I need to get the setter/getter function before overriding them.

Answer

alexpods picture alexpods · Dec 22, 2014

Actually, __lookupGetter__ and __lookupSetter__ methods are deprecated. Instead of these you must use:

/* __lookupGetter__ */
Object.getOwnPropertyDescriptor(obj, 'MyField').get;

/* __lookupSetter__ */
Object.getOwnPropertyDescriptor(obj, 'MyField').set;

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