Listening for variable changes in JavaScript

Question

Is it possible to have an event in JS that fires when the value of a certain variable changes? JQuery is accepted.

Answer 1

A rather simple and simplistic solution is to just use a function call to set the value of the global variable, and never set its value directly. This way you have total control:

var globalVar;

function setGlobalVar(value) {
    globalVar = value;
    console.log("Value of globalVar set to: " + globalVar);
    //Whatever else
}

There is no way to enforce this, it just requires programming discipline... though you can use grep (or something similar) to check that nowhere does your code directly set the value of globalVar.

Or you could encapsulate it in an object and user getter and setter methods... just a thought.