Question

我正在使用Angular8，并且想使用Bootstrap4导航栏。但是下拉菜单不起作用

这是Angular.json代码

"scripts": [
              "node_modules/jquery/dist/jquery.min.js",
              "node_modules/popper.js/dist/umd/popper.min.js",
              "node_modules/bootstrap/dist/js/bootstrap.min.js"
            ]

这是我的navbar.component.html代码

<nav class="navbar navbar-expand-lg navbar-light bg-light">
        <a class="navbar-brand" href="#">Navbar</a>
        <button class="navbar-toggler" type="button" data-toggle="collapse" data-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 active">
              <a class="nav-link" href="#">Home <span class="sr-only">(current)</span></a>
            </li>
            <li class="nav-item">
              <a class="nav-link" href="#">Features</a>
            </li>
            <li class="nav-item">
              <a class="nav-link" href="#">Pricing</a>
            </li>
            <li class="nav-item dropdown">
              <a class="nav-link dropdown-toggle" href="#" id="navbarDropdownMenuLink" role="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
                Dropdown Menu
              </a>
              <div class="dropdown-menu" aria-labelledby="navbarDropdownMenuLink">
                <a class="dropdown-item" href="#">Action</a>
                <a class="dropdown-item" href="#">Another action</a>
                <a class="dropdown-item" href="#">Something else here</a>
              </div>
            </li>
          </ul>
        </div>
      </nav>

这是我在Browser中的输出

我想念什么吗？

Answer 1

将您的navbar.component.html更改为此：

<nav class="navbar navbar-expand-lg navbar-light bg-light">
        <a class="navbar-brand" href="#">Navbar</a>
        <button class="navbar-toggler" type="button">
          <span class="navbar-toggler-icon"></span>
        </button>
        <div class="collapse navbar-collapse" id="navbarNavDropdown">
          <ul class="navbar-nav">
            <li class="nav-item active">
              <a class="nav-link" href="#">Home <span class="sr-only">(current)</span></a>
            </li>
            <li class="nav-item">
              <a class="nav-link" href="#">Features</a>
            </li>
            <li class="nav-item">
              <a class="nav-link" href="#">Pricing</a>
            </li>
            <li class="nav-item dropdown" [class.show]="navbarOpen">
              <a class="nav-link dropdown-toggle" (click)="toggleNavbar()">
                Dropdown Menu
              </a>
              <div class="dropdown-menu" [class.show]="navbarOpen" aria-labelledby="navbarDropdownMenuLink">
                <a class="dropdown-item" href="#">Action</a>
                <a class="dropdown-item" href="#">Another action</a>
                <a class="dropdown-item" href="#">Something else here</a>
              </div>
            </li>
          </ul>
        </div>
      </nav>

然后在您的navbar.component.ts中，在构造函数上方编写：

public navbarOpen: boolean = false;

，然后在您的构造函数下输入：

public toggleNavbar() {
  this.navbarOpen = !this.navbarOpen;
}

请从不在Angular2 +项目中使用jQuery。
1.您不需要它
2.我认为这将是反模式

如果您那样做，它应该可以工作。给我一些反馈是否对您有所帮助。

Answer 2

enter image description here and check it

导航栏不适用于Angular8和Bootstrap4

2 个答案: