kotrackchnagesextender.js

kotrackchnagesextender.js

/*global ko*/
ko.extenders.trackChange = function (target, track) {
    "use strict";

    if (track) {

        target.isDirty = ko.observable(false);
        target.originalValue = target();
        target.subscribe(function (newValue) {
            // use != not !== so numbers will equate naturally
            target.isDirty(newValue !== target.originalValue);
        });
    }
    return target;
};

ko.observable.fn.resetDirty = function() {
  if (this.isDirty) {
    this.isDirty(false);
    this.originalValue = this();
  }
};