select2 is not showing arrow down icon

Question

my select2 is working perfectly, I just have 1 small bug, the arrow down icon from the select box is not showing, do you know guys why?

this make the user a bit confuse I tried find the bug, but I could not fix the error, can you please guys help me? the code is not working here but it is working in the jsfiddle link.

jsfiddle: http://jsfiddle.net/yszv1ob2/

$("#e1").select2();

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
<script src="http://cdnjs.cloudflare.com/ajax/libs/select2/3.2/select2.min.js"></script>
<link rel="stylesheet" href="http://cdnjs.cloudflare.com/ajax/libs/select2/3.2/select2.css">

<select multiple id="e1" style="width:300px">
  <option value="AL">Alabama</option>
  <option value="Am">Amalapuram</option>
  <option value="An">Anakapalli</option>
  <option value="Ak">Akkayapalem</option>
  <option value="WY">Wyoming</option>
</select>

Answer 1

For Select2 version 4.0.5+, this code exactly duplicates the single-select arrow.

.select2-selection--multiple:before {
    content: "";
    position: absolute;
    right: 7px;
    top: 42%;
    border-top: 5px solid #888;
    border-left: 4px solid transparent;
    border-right: 4px solid transparent;
}

Answer 2

You have used multi-select dropdown and used plugin(Select2) don't add dropdown arrow in multi-select dropdown. So if you want to add dropdown arrow, you have to add some custom CSS like below.

ul.select2-choices {
    padding-right: 30px !important;
}

ul.select2-choices:after {
    content: "";
    position: absolute;
    right: 10px;
    top: 50%;
    transform: translateY(-50%);
    border-top: 5px solid #333;
    border-left: 5px solid transparent;
    border-right: 5px solid transparent;
}