这是我的代码的Fiddle链接 我引导用户4。 当我单击下拉列表时，下拉列表将在我的本地环境中关闭。小提琴，它工作正常。 我在本地缺少哪一点。甚至我的本地和小提琴设置都是相同的。
<div class="dropdown d-inline-block">
<button class="btn btn-info dropdown-toggle" type="button" id="dropdownMenuButton" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
Advance Filter
</button>
<div class="dropdown-menu pr-2 pl-2 advance-filter-dropdown" aria-labelledby="dropdownMenuButton">
<div class="advance-filter-wrap">
<div class="row">
<div class="col-6">
<div class="form-group">
<label for="" class="sr-only">By Agent</label>
<select name="" id="" class="form-control">
<option value="agent1">Agent 1</option>
<option value="agent2">Agent 2</option>
<option value="agent3">Agent 3</option>
<option value="agent4">Agent 4</option>
</select>
</div>
</div>
<div class="col-6">
<div class="form-group">
<label for="" class="sr-only">Lead Potential</label>
<select name="" id="" class="form-control">
<option value="huge">Huge</option>
<option value="medium">Medium</option>
<option value="small">Small</option>
</select>
</div>
</div>
</div>
</div>
<div class="advance-filter-footer text-right">
<button class="btn btn-danger btn-sm">Reset All</button>
<button class="btn btn-success btn-sm">Apply</button>
</div>
</div>
</div>