Autocomplete not working

$(function () {
    var apiurl = baseurls + "api/SearchTypeahead/Typeahead";
    $(document).on("keydown.autocomplete", "#searchlist", function () {
        var charLength = $(this).val().length;
        if (charLength >= 3) {
            $("#searchlist").autocomplete({    
                source: function (request, response) {
                    debugger;
                    $.ajax({
                        url: apiurl,
                        dataType: "json",
                        data: {
                            term: request.term
                        },
                        success: function (data) {
                            response($.map(data, function (item) {

                                if (data.indexOf(item) === -1) {
                                    return { name: "No Results." }
                                } else {
                                    return {
                                        name: item
                                    }
                                }
                            }))

                        }
                    })
                },
                serarch: function () {
                    $(".messagePopup").show();
                    Loader();
                },
                focus: function (event, ui) {
                    jQuery(event.target).val(ui.item.a);
                    return false;
                },
                select: function (event, ui) {
                    var name = ui.item.name.replace(" ", "-");
                    window.location = "/" + name;
                },
                open: function () {
                    //  $(".messagePopup").hide();
                    $('li.ui-menu-item ').removeClass('ui-menu-item');
                },

            }).data("ui-autocomplete")._renderItem = function (ul, item) {
                
                return $("<li></li>")
                    .data("ui-autocomplete-item", item)
                    .append("<a href='javascript:void(0)' style='font:12px'>" + item.name + "</a>")                  
                  .appendTo(ul);

            };
        }
    });
});