KoLite 1.0.2

// asyncCommand
// -----------------------------

<button data-bind="command:
saveCommand">Save</button>



self.saveCommand = ko.asyncCommand({
   execute: function(callback) {
       $.ajax({
           complete: callback,
           data: { name: self.name() },
           type: 'POST',
           url: '/save/',
                   
           success: function(result) {
               alert('Name saved:' + result)
           }
       })
   },
       
   canExecute: function(isExecuting) {
       return !isExecuting && self.name()
   }
})


// asyncCommand and activity
// -----------------------------


<button data-bind="activity: saveCommand.isExecuting, command: saveCommand">Save</button>



// dirtyFlag
// -----------------------------


// Your model
var Person = function () {
   var self = this;
   self.id = ko.observable();
   self.firstName = ko.observable().extend({ required: true });
   self.lastName = ko.observable().extend({ required: true });
   self.dirtyFlag = new ko.DirtyFlag([self.firstName,self.lastName]);
   return self;
};


// Hook these into your viewmodel ...


//Property on your view model. myPerson is an instance of Person.
//Did it Change?
isDirty = ko.computed(function () {
   return myPerson().dirtyFlag().isDirty();
}),

//Resync Changes
dirtyFlag().reset();