Modified track changes knockout extended that can handle detection of changes to complex objects

complextracker.js

var traverseObservables = function (obj, action) {
    ko.utils.arrayForEach(getObjProperties(obj), function (observable) {
        if (observable && observable.value && !observable.value.nodeType && ko.isObservable(observable.value)) {
            action(observable);
        }
    });
};
    
ko.extenders.trackChange = function (target, track) {
    if (track) {
        target.hasValueChanged = ko.observable(false);
        target.hasDirtyProperties = ko.observable(false);
 
        target.isDirty = ko.computed(function () {
            return target.hasValueChanged() || target.hasDirtyProperties();
        });
 
        var unwrapped = target();
        if ((typeof unwrapped == "object") && (unwrapped !== null)) {
            traverseObservables(unwrapped, function (obj) {
                applyChangeTrackingToObservable(obj.value);
 
                obj.value.isDirty.subscribe(function (isdirty) {
                    if (isdirty) target.hasDirtyProperties(true);
                });
            });
        }
 
        target.originalValue = target();
        target.subscribe(function (newValue) {
            // use != not !== so numbers will equate naturally
            target.hasValueChanged(newValue != target.originalValue);
            target.hasValueChanged.valueHasMutated();
        });
    }
 
    return target;
};