an ajax request to populate suggestions on a search field, elasticsearch content

jquery_dropdown_autocomplete_ajax.js

$(function() {
    var ajaxLoading = false;

    $( "#search" ).keypress(function() {

        var postData = {
            "suggest" : {
                "text" : $("#search").val(),
                "completion" : {
                    "field" : "suggest"
                }
            }
        };

        if(!ajaxLoading) {
            ajaxLoading = true;

            $("#search").autocomplete({
                source: function(request, response){
                    $.ajax({
                        url: "/search/suggest",
                        type: "GET",
                        dataType: "JSON",
                        data: JSON.stringify(postData),
                        success: function (data) {
                            response(data);
                            ajaxLoading = false;
                        }
                    });
                }
            });
        }

    });

});