动态行随着每次添加新行而变得越来越大

Question

每当添加新行时，动态行就会变得越来越大。在将typeahed函数包含在动态行中之后，每次添加新行时，新行的大小都是以前的两倍。如果我删除createTypeahead（$（'＃R'+ rowIdx +'input.typeahead'））;从代码中，行将恢复为正常大小，但是，提前输入将停止工作。

    var skus = new Bloodhound({
  datumTokenizer: Bloodhound.tokenizers.obj.whitespace('value'),
  queryTokenizer: Bloodhound.tokenizers.whitespace,
  //prefetch: '../data/films/post_1960.json',
  remote: {
    url: 'http://localhost:3000/user/search?key=%QUERY',
    wildcard: '%QUERY'
  }
});

$(document).ready(function () {
  function createTypeahead($els) {
    $els.typeahead(
    {hint: true,
      highlight: false,
      minLength: 1
    },
    {
        name: 'sku',
        //remote: 'http://localhost:3000/user/search?key=%QUERY',
        source: skus,
        limit: 10
    });
}

  //for the already present elements
  createTypeahead($('input.typeahead'));

  // Denotes total number of rows 
  var rowIdx = 0; 

  // jQuery button click event to add a row 
  $('#addBtn').on('click', function () { 

    // Adding a row inside the tbody. 
    $('#tbody').append(`<tr id="R${++rowIdx}"> 
      <td class="row-index text-center"> 
      <td></td>
      <td><input class="typeahead tt-query" spellcheck="false" autocomplete="off" name="sku" type="text" placeholder="type Sku"></td>
      <td></td>
      <td></td>
      <td></td>
      <td></td>
      <td></td>
      <td></td>
      <td></td>
      <td></td>
      <td></td>
      <td class="text-center"> 
        <button class="btn btn-danger remove"
        type="button">Remove</button> 
        </td> 
      </tr>`);
  createTypeahead($('#R'+rowIdx+'input.typeahead')); 
  }); 

编辑：添加更多代码

//Extract the keyword.
//Return the result depending on the keyword.
router.get('/search', function(req,res){
//call MySQL Query. and //extract key using req.query.key
  db.query('SELECT sku FROM item_new WHERE sku like "%'+req.query.key+'%"',
    function(err, rows, fields) {
      if (err) throw err;
      var data=[];
      for(i=0;i<rows.length;i++){
        data.push(rows[i].sku);
      }
//form JSON response and return. 
      res.end(JSON.stringify(data));
    });
});