Is it possible to implement dynamic getters/setters in JavaScript?

Question

I am aware of how to create getters and setters for properties whose names one already knows, by doing something like this:

// A trivial example:
function My         


        

Answer 1

var x={}
var propName = 'value' 
var get = Function("return this['" + propName + "']")
var set = Function("newValue", "this['" + propName + "'] = newValue")
var handler = { 'get': get, 'set': set, enumerable: true, configurable: true }
Object.defineProperty(x, propName, handler)

this works for me