Knockout datepicker default

by cillay

HTML

<script src="//cdnjs.cloudflare.com/ajax/libs/modernizr/2.6.2/modernizr.js"></script>
<script src="//cdnjs.cloudflare.com/ajax/libs/jqueryui/1.8.17/jquery-ui.min.js"></script>
<link rel="stylesheet" href="//cdnjs.cloudflare.com/ajax/libs/jqueryui/1.10.3/css/base/minified/jquery-ui.min.css">
<script src="//cdnjs.cloudflare.com/ajax/libs/underscore.js/1.4.2/underscore.js"></script>
<script src="//cdnjs.cloudflare.com/ajax/libs/knockout/2.1.0/knockout-min.js"></script>
<script src="//cdnjs.cloudflare.com/ajax/libs/knockout.mapping/2.3.2/knockout.mapping.js"></script>
<script src="//cdnjs.cloudflare.com/ajax/libs/amplifyjs/1.1.0/amplify.js"></script>
<script src="//cdnjs.cloudflare.com/ajax/libs/moment.js/1.7.2/moment.js"></script>
<script src="//cdnjs.cloudflare.com/ajax/libs/jquery-validate/1.9.0/jquery.validate.js"></script>
<script src="//cdnjs.cloudflare.com/ajax/libs/jquery.maskedinput/1.3.1/jquery.maskedinput.js"></script>
<script src="//cdnjs.cloudflare.com/ajax/libs/qtip2/2.0.1/jquery.qtip.js"></script>
<link rel="stylesheet" href="//cdnjs.cloudflare.com/ajax/libs/qtip2/2.0.1/jquery.qtip.css">
<input id="txt_ExpirationDate" 
 data-bind="datepicker: Client.ExpirationDate, datepickerOptions: { minDate: MinExpirationDate() }" 
/>

<button id="btnAdd">Add New</button>

<button id="btnUpdate">Update</button>

JavaScript

// From RP Niemeyer - http://stackoverflow.com/a/6400701
ko.bindingHandlers.datepicker = {
    init: function(element, valueAccessor, allBindingsAccessor) {
        //initialize datepicker with some optional options
        var options = allBindingsAccessor().datepickerOptions || {};
        $(element).datepicker(options);

        //handle the field changing
        ko.utils.registerEventHandler(element, "change", function() {
            var observable = valueAccessor();
            observable($(element).datepicker("getDate"));
        });

        //handle disposal (if KO removes by the template binding)
        ko.utils.domNodeDisposal.addDisposeCallback(element, function() {
            $(element).datepicker("destroy");
        });

    },
    update: function(element, valueAccessor) {
        var value = ko.utils.unwrapObservable(valueAccessor()),
            current = $(element).datepicker("getDate");

        if (value - current !== 0) {
            $(element).datepicker("setDate", value).val($.datepicker.formatDate("mm/dd/yy", value));
        }
    }
};

var UpdateModel = {
    Client: {
        Name: "John Q Public",
        ExpirationDate: ko.observable(new Date(2005, 8, 30))
    },
    MinExpirationDate: function () {
        var tomorrow = new Date();
        tomorrow.setHours(24,0,0,0);
        return tomorrow;
    }
};
var AddModel = {
    Client: {
        Name: null,
        ExpirationDate: null
    },
    MinExpirationDate: function () {
        var tomorrow = new Date();
        tomorrow.setHours(24,0,0,0);
        return tomorrow;
    }
};

$("#btnAdd").on("click", function() { ko.applyBindings(AddModel); });
$("#btnUpdate").on("click", function() { ko.applyBindings(UpdateModel); });