 label #sidebar_btn {
      z-index: 1;
      color: #fff;
      position: fixed;
      cursor: pointer;
      left: 300px;
      padding-left: 60px;
      margin-top:15px;
      font-size: 20px;
      
      transition: 0.5s;
      transition-property: color;
    }
  </style>
</head>
<br><br>
<div class="container">
  <div class="panel panel-primary">
    <div class="panel-heading">
      <h6 class="panel-title">Customers</h6>
    </div>
    <table class="table table-hover" id="dev-table">
      <thead>
  