<link rel="stylesheet" href="https://cdn.0305.ink/js/fSelect/fSelect.css"> <select class="demo" multiple="multiple"> <option value="0">前壁</option> <option value="1">后壁</option> <option value="1">小弯侧</option> <option value="1">大弯侧</option> </select> <script src="https://cdn.0305.ink/js/fSelect/fSelect.js"></script>
