Example use case demonstrating complex object change tracking at multiple levels

complexexamplemultilevel.js

var viewModel = {
    Name: ko.observable("Pete"),
    Age: ko.observable(29),
    Skills: ko.observable({
        Tdd: ko.observable(true),
        Knockout: ko.observable(true),
        ChangeTracking: ko.observable(false),
        Languages: ko.observable({
            Csharp: ko.observable(false),
            Javascript: ko.observable(false)
        }),
    }),
    Occupation: ko.observable("Developer")
};

applyChangeTracking(viewModel);

viewModel.Skills().ChangeTracking(true);
viewModel.Skills().Languages({
    Csharp: ko.observable(true),
    Javascript: ko.observable(true),
});

getChangesFromModel(viewModel);
/* -> { 
    "Skills": { 
        ChangeTracking: true,
        Languages: { 
            Csharp: true,
            Javascript: true
        }
    } 
} */