javascript onclick в цикле, навешивание события на подгруженные элементы

var startList = 1; 
var listLimit = 10; 
var listLength; 
var wrapper = document.getElementById('wrapper'); 
var times = 1; 
 
buildList(); 
 
 
 
function buildList() { 
  wrapper.innerHTML = ''; 
  listLength = Math.round(Math.random() * listLimit); 
  for ( var idx = startList; idx < (startList + listLength); idx++) { 
    console.log(idx); 
    getTodo(idx) 
      .then(function(todo) { 
        var elem = document.createElement('div'); 
        elem.classList.add('elem'); 
        elem.innerHTML = '<a class="item" data-type="' + times.toString() +'">' + todo.title + '</a>'; 
        elem.addEventListener('click', buildList, false); 
        wrapper.appendChild(elem); 
      }); 
  } 
  startList += listLength; 
  times++; 
} 
 
function getTodo(id) { 
  return fetch('http://jsonplaceholder.typicode.com/todos/' + id.toString()) 
  .then(function(res) {return res.json();}) 
  .catch(function(err) {throw(err);}); 
}

#wrapper { 
  min-height: 100px; 
  min-width: 100px; 
  background-color: #ccc; 
}

<div id="wrapper"> 
</div>