Question

Is there a way to detect if an global Boolean values changes from false to true with jQuery?

Answer 1

Yes, use a getter/setter pair of which the setter traps the setting of the variable: http://jsfiddle.net/M768B/.

(function() {
    var val = false;

    ​Object.defineProperty(window, "something", {
        get: function() {
            return val;
        },
        set: function(v) {
            val = !!v; // `!!` to force setting a boolean
            alert("Changed to " + val);
        }​​
    });
})();