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

Recently found myself with the same issue. Wanted to listen for on change of a variable and do some stuff when the variable changed.

Someone suggested a simple solution of setting the value using a setter.

Declaring a simple object that keeps the value of my variable here:

var variableObject = {
    value: false,
    set: function (value) {
        this.value = value;
        this.getOnChange();
    }
}

The object contains a set method via which I can change the value. But it also calls a getOnChange() method in there. Will define it now.

variableObject.getOnChange = function() {
    if(this.value) {
        // do some stuff
    }
}

Now whenever I do variableObject.set(true), the getOnChange method fires, and if the value was set as desired (in my case: true), the if block also executes.

This is the simplest way I found to do this stuff.