>
              <span class="menu-title">Charts</span>
              <i class="menu-arrow"></i>
            </a>
            <div class="collapse" id="charts">
              <ul class="nav flex-column sub-menu">
                <li class="nav-item"> <a class="nav-link" href="/chartjs.html">ChartJs</a></li>
              </ul>
            </div>
          </li>
          <li class="nav-item">
            <a class="nav-link" data-bs-toggle="collapse" href="#tables" aria-expanded="false" aria-controls="tables"