Question

How do getter or setter works on object in javascript ?

i.e.

In python if I call a nonexistent method on an object I could intercept the call via getter and setter and in turn return from getter and setter.

How do I do similar functionality in JavaScript ?

https://github.com/Flotype/now/blob/master/lib/client/now.js implements this functionality somehow. I didn’t understand the trick. can anyone explain ?

Answer 1

Creating the same functionality is virtually impossible in Javascript. My best guess would be something like this:

var getter = function (propName) { 
    if (propName in this) { 
        return this[propName]; 
    } else { 
        return "no prop"; 
    } 
};

You can call this function on any object you like using this syntax:

a = { "test": "yes" };
b = {}
console.log(getter.call(a, "test"));
console.log(getter.call(b, "test"));

It’s not the best solution but I don’t think there’s a better way.