Selectize Knockout Bindings

HTML

<script src="http://knockoutjs.com/downloads/knockout-2.3.0.js"></script>
<script src="http://brianreavis.github.io/selectize.js/js/selectize.js"></script>
<link rel="stylesheet" href="//netdna.bootstrapcdn.com/twitter-bootstrap/2.3.2/css/bootstrap-combined.min.css">
<script src="//netdna.bootstrapcdn.com/twitter-bootstrap/2.3.2/js/bootstrap.min.js"></script>
<link rel="stylesheet" href="http://brianreavis.github.io/selectize.js/css/selectize.bootstrap2.css">
<select id="select-people" data-bind="selectize: peopleList, selectizeValue: currentPerson, labelField: 'text', valueField: 'value'"></select>

<ul>
    <li data-bind="text: currentPerson().text"></li>
</ul>

JavaScript

ko.bindingHandlers.selectize = {
    init: function(element, valueAccessor, allBindingsAccessor, viewModel, bindingContext) {
        var allBindings = allBindingsAccessor();
        $(element).selectize({
            options: ko.unwrap(valueAccessor()),
            dataAttr: 'data-test',
            labelField: allBindings.labelField,
            valueField: allBindings.valueField,
            onInitialize: function() {
                this.setValue(ko.unwrap(allBindings.selectizeValue)[allBindings.valueField]);
            },
            onChange: function(newValue) {
                allBindings.selectizeValue(this.options[newValue]);
            }
        });
        ko.utils.domNodeDisposal.addDisposeCallback(element, function() {
            $(element).selectize('destroy');
        });
    },
    update: function(element, valueAccessor, allBindingsAccessor, viewModel, bindingContext) {
        var $selectize = $(element).data('selectize');
        // addOption detects whether the parameter is a single value or an array
        $selectize.addOption(ko.unwrap(valueAccessor()));
        $selectize.refreshOptions(false);
    }
};

var ViewModel = function() {
    var self = this;
    
    self.peopleList = ko.observableArray();
    self.currentPerson = ko.observable();
};

var viewModel = new ViewModel();

viewModel.peopleList([
    {
        'value': 1,
        'text': 'Tom'
    },
    {
        'value': 2,
        'text': 'Andy'
    },
    {
        'value': 3,
        'text': 'Mike'
    },
    {
        'value': 4,
        'text': 'Cory'
    },
    {
        'value': 5,
        'text': 'Aaron'
    },
    {
        'value': 6,
        'text': 'Haitham'
    },
    {
        'value': 7,
        'text': 'Basel'
    },
    {
        'value': 8,
        'text': 'Sakina'
    },
    {
        'value': 9,
        'text': 'Jeff'
    },
    {
        'value': 10,
        'text': 'Ken'
    }
]);

viewModel.currentPerson(viewModel.peopleList()[3]);

$(function() {
   ...