Knockout binding for Tagit

gistfile1.txt

ko.bindingHandlers.tags = {
    init: function (element, valueAccessor, allBindingsAccessor) {

        var bind = function() {
            var observable = valueAccessor();
            observable($(element).tagit("assignedTags").join(','));
        };
        
        var options = {
            allowSpaces: true,
            caseSensitive: false,
            showAutocompleteOnFocus: true,
            afterTagAdded: bind,
            afterTagRemoved: bind
        };

        var tags = allBindingsAccessor()["tagsSource"];
        if (tags)
            $.extend(options, {                
                autocomplete: { source: tags, delay: 0, minLength: 0 }
            });
        
        $(element).tagit(options);
        $(element).data('uiTagit').tagInput.css("width", "50px");
    },
    update: function (element, valueAccessor) {
        var value = ko.utils.unwrapObservable(valueAccessor());
        var tags = value.split(',');
        $(element).tagit("removeAll");
        for (var x = 0; x < tags.length; x++) {
            $(element).tagit("createTag", tags[x]);
        }
    }
}