我必须定制由COREUI 4.x主题提供的侧边栏。下面是我的侧边栏代码

<div class="app-body">
  <div class="sidebar">
    <nav class="sidebar-nav">
      <ul class="nav">
        <li class="nav-item">
          <a
            class="nav-link"
            routerLink="/dashboard"
            [routerLinkActive]="['active']"
            [routerLinkActiveOptions]="{ exact: true }"
          >
            <i class="icon-speedometer"></i> Dashboard
          </a>
        </li>
        <li class="nav-item">
          <a
            class="nav-link"
            href="#"
            routerLink="/alerts-configuration"
            [routerLinkActive]="['active']"
            [routerLinkActiveOptions]="{ exact: true }"
          >
            <i class="icon-layers"></i> Alert Configuration
          </a>
        </li>
        <li
          class="nav-item nav-dropdown"
          dropdown
          [routerLinkActive]="['active']"
          [routerLinkActiveOptions]="{ exact: true }"
        >
          <a class="nav-link nav-dropdown-toggle">
            <i class="icon-puzzle"></i>Administration
          </a>
          <ul class="nav-dropdown-items">
            <li class="nav-item">
              <a
                class="nav-link"
                routerLink="/device-management/devices"
                [routerLinkActive]="['active']"
                [routerLinkActiveOptions]="{ exact: true }"
              >
                <i class=""></i>Devices Management
              </a>
            </li>
            <li class="nav-item">
              <a
                class="nav-link"
                routerLink="/sites"
                [routerLinkActive]="['active']"
                [routerLinkActiveOptions]="{ exact: true }"
              >
                <i class="icon-settings"></i>Sites Management
              </a>
            </li>
          </ul>
        </li>
      </ul>
    </nav>
    <button class="sidebar-minimizer brand-minimizer" type="button"></button>
  </div>
</div>

现在，当我尝试点击管理，它不会打开下拉菜单，也当我尝试从底部的箭头最小化，这不会工作，以及。请帮助！
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