select2.js multiple line dropdown

HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/select2/4.0.5/js/select2.min.js"></script>
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/select2/4.0.5/css/select2.min.css">
<link rel="stylesheet" href="//cdnjs.cloudflare.com/ajax/libs/select2/3.2/select2.css">
<select  id="e1" style="width:300px" multiple="multiple">
  <option value="1">a</option>
  <option value="2">b</option>
  <option value="3">c</option>
</select>

JavaScript

$("#e1").select2()({
  templateSelection: formatSelection
});


function formatSelection(item) {
  var $returnString = $('<span>' + "selected" + '</span>');
  return $returnString;
};

function format(item) {
        var originalText = item.text;

        return "<div title ='" + originalText.replace(/'/g, '&apos;') + "' style='text-overflow: ellipsis;width:260px;white-space: nowrap;overflow: hidden;'>" + originalText + "</div>";
        };