kendo autocomplete on numeric field -

trying use autocomplete datatextfield integer. keep getting "tolower" or "indexof" error. cant find single example of trying autocomplete numbers.

ps: works fine text field

http://jsfiddle.net/nslp8/

$("#autocomplete").kendoautocomplete({     datatextfield: "value",     select: function(e) {         var dataitem = this.dataitem(e.item.index());          //output selected dataitem         $("#result").html(kendo.dataitem);            },     datasource: {         data: [             { id : 1, value: 1 },             { id : 2, value: 2 },             { id : 3, value: 3 },             { id : 4, value: 4 }         ]     } }); 

as workaround, can try adding tolowercase() prototype number

$(document).ready(function() {   if (!number.prototype.tolowercase) {     number.prototype.tolowercase = function() {       return this.tostring();     }   } }); 

$(document).ready(function() {    if (!number.prototype.tolowercase) {      number.prototype.tolowercase = function() {        return this.tostring();      }    }  });    $("#autocomplete").kendoautocomplete({    datatextfield: "value",    select: function(e) {      var dataitem = this.dataitem(e.item.index());        //output selected dataitem      $("#result").html(kendo.dataitem);    },    datasource: {      data: [{        id: 1,        value: 1      }, {        id: 2,        value: 2      }, {        id: 3,        value: 3      }, {        id: 4,        value: 4      }]    }  });

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>  <link href="http://cdn.kendostatic.com/2013.2.716/styles/kendo.common.min.css" rel="stylesheet" />  <script src="http://cdn.kendostatic.com/2013.2.716/js/kendo.all.min.js"></script>  <input id="autocomplete" />  <div id="result"></div>