Twitter typeahead not showing matching records using jquery

$(document).ready(function () {
           console.log("Debugging started");
       });

           $("#customer").mouseleave(function () {
               debugger;
                   var searchlist = new Bloodhound({
                       datumTokenizer: function (searchlist) {
                           return Bloodhound.tokenizers.whitespace("customerName");
                       },
                       queryTokenizer: Bloodhound.tokenizers.whitespace,
                       remote: {
                           url: '/api/Customers?query=%QUERY',
                           wildcard: '%QUERY',
                           filter: function (response) {
                               return response.customerName;
                           }
                       }
                   });

                    //Initialize the searchlist
                   searchlist.initialize();

                   $('#customer').typeahead({
                       hint: true,
                       highlight: true,
                       minLength: 3
                   },
                       {
                           name: 'searchlist',
                           displayKey: function (suggestions) { return suggestions.keyword },
                           source: searchlist.ttAdapter(),
                           limit: 10
                       });
                         
           });