我正在使用 bootstrap 5 cdn，我想打开下拉列表而不单击下拉列表。

我使用导航栏并希望显示“下拉链接”：

<nav class="navbar navbar-expand-sm navbar-light bg-light">
  <div class="container-fluid">
    <a class="navbar-brand" href="#">Navbar</a>
    <button
      class="navbar-toggler"
      type="button"
      data-bs-toggle="collapse"
      data-bs-target="#navbarNavDropdown"
      aria-controls="navbarNavDropdown"
      aria-expanded="false"
      aria-label="Toggle navigation"
    >
      <span class="navbar-toggler-icon"></span>
    </button>
    <div class="collapse navbar-collapse" id="navbarNavDropdown">
      <ul class="navbar-nav">
        <li class="nav-item">
          <a class="nav-link active" aria-current="page" href="#">Home</a>
        </li>
        <li class="nav-item dropdown">
          <a
            class="nav-link dropdown-toggle"
            href="#"
            id="test"
            role="button"
            data-bs-toggle="dropdown"
            aria-expanded="false"
          >
            Dropdown link
          </a>
          <ul class="dropdown-menu" aria-labelledby="navbarDropdownMenuLink">
            <li><a class="dropdown-item" href="#">Action</a></li>
            <li><a class="dropdown-item" href="#">Another action</a></li>
            <li><a class="dropdown-item" href="#">Something else here</a></li>
          </ul>
        </li>
      </ul>
    </div>
  </div>
</nav>
<button class="btn btn-primary btn-sm" (click)="open()">Abrir</button>

在组件中我尝试执行以下操作，但它不起作用：

export class AppComponent {
  open() {
    const dropdown = document.getElementById('test');
    dropdown.click();
  }
}

我在 stackblitz 中做到了：测试