select2未显示向下箭头图标

Question

我的select2工作得很好，我只有一个小虫子，选择框中的箭头向下图标没有显示，你知道为什么这些人吗？

这让用户有点困惑我尝试找到这个bug，但是我无法解决这个错误，请问各位帮帮我吧？代码在这里不起作用，但它在jsfiddle链接中工作。

的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

您已使用多选下拉列表和已使用的插件（Select2）不在多选下拉列表中添加下拉箭头。因此，如果您想添加下拉箭头，您必须添加一些自定义CSS，如下所示。

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;
}

Answer 2

对于Select2版本4.0.5+，此代码完全复制单选箭头。

.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 3

$("#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 4

未显示，因为您在select标记中有multiple属性，只需删除它：

<select 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 5

$(function () {
  $("#select1").select2();
});

.select2-container--default .select2-selection--multiple:before {
    content: ' ';
    display: block;
    position: absolute;
    border-color: #888 transparent transparent transparent;
    border-style: solid;
    border-width: 5px 4px 0 4px;
    height: 0;
    right: 6px;
    margin-left: -4px;
    margin-top: -2px;top: 50%;
    width: 0;cursor: pointer
}

.select2-container--open .select2-selection--multiple:before {
    content: ' ';
    display: block;
    position: absolute;
    border-color: transparent transparent #888 transparent;
    border-width: 0 4px 5px 4px;
    height: 0;
    right: 6px;
    margin-left: -4px;
    margin-top: -2px;top: 50%;
    width: 0;cursor: pointer
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<link href="https://cdnjs.cloudflare.com/ajax/libs/select2/4.0.6-rc.0/css/select2.min.css" rel="stylesheet" />
<script src="https://cdnjs.cloudflare.com/ajax/libs/select2/4.0.6-rc.0/js/select2.min.js"></script>

<select multiple id="select1" 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>

资料来源：https://github.com/select2/select2/issues/167#issuecomment-322461384