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Update knockout.dirtiable.js #3

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Update knockout.dirtiable.js #3

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41 changes: 13 additions & 28 deletions knockout.dirtiable.js
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Original file line number Diff line number Diff line change
Expand Up @@ -2,33 +2,18 @@
* based on the the work done by Ryan Niemeyer.
* (http://www.knockmeout.net/2011/05/creating-smart-dirty-flag-in-knockoutjs.html)
*/
ko.extenders.dirtiable = function(target) {
var _dirty = {};
_dirty.isDirty = ko.observable(false);
_dirty.initialState = null;
_dirty.tracker = ko.computed(function() {
if(!_dirty.isDirty())
ko.toJSON(target);

return(_dirty.isDirty());
ko.extenders.dirtiable = function (target) {
var _initialState = ko.observable(ko.toJSON(target)),
_isInitiallyDirty = ko.observable(false);

target.dirty = ko.computed(function () {
return _isInitiallyDirty() || _initialState() !== ko.toJSON(target);
});

//Track changes to observable
_dirty.tracker.subscribe(function() {
if(!_dirty.isDirty() && _dirty.initialState !== ko.toJSON(target))
_dirty.isDirty(true);
});

//Create the dirty flag on the observable
target.dirty = ko.computed(function() {
return(_dirty.isDirty());
});

//Allow users to reset the dirty flag
target.clean = function() {
_dirty.initialState = ko.toJSON(target);
_dirty.isDirty(false);
}


target.clean = function () {
_initialState(ko.toJSON(target));
_isInitiallyDirty(false);
};

return target;
}
};