bootstrap-4 – 折叠无法在ng-bootstrap和angular 4 app中使用navbar breadcrumb按钮

我正在为我的应用程序使用角度4和bootstrap 4 beta 2和ng-bootstrap,并使用ng-bootstrap.

我已经从bootstrap文档示例中添加了导航栏.

代码如下所示：

<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="#navbarTogglerDemo02" aria-controls="navbarTogglerDemo02" aria-expanded="false" aria-label="Toggle navigation">
    <span class="navbar-toggler-icon"></span>
  </button>

  <div class="collapse navbar-collapse" id="navbarTogglerDemo02">
    <ul class="navbar-nav mr-auto mt-2 mt-lg-0">
      <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="#">Link</a>
      </li>
      <li class="nav-item">
        <a class="nav-link disabled" href="#">Disabled</a>
      </li>
    </ul>
    <form class="form-inline my-2 my-lg-0">
      <input class="form-control mr-sm-2" type="search" placeholder="Search">
      <button class="btn btn-outline-success my-2 my-sm-0" type="submit">Search</button>
    </form>
  </div>
</nav>

我还在angular-cli.json中添加了bootstrap样式.该代码如下所示：

"styles": [
        "../node_modules/bootstrap/dist/css/bootstrap.min.css",
        "styles.css"
      ],

移动视图上的“面包屑”按钮在其单击时没有响应.当我试图检查时：我知道“崩溃”类没有被添加到点击按钮上.

我现在有一个解决方案.只需使用ng-bootstrap即可解决您的问题.

Html文件：

<nav class="navbar navbar-expand-lg navbar-light bg-light">
  <a class="navbar-brand" href="#">Navbar</a>
  <button class="navbar-toggler btn btn-outline-primary" type="button" data-toggle="collapse" data-target="#navbarTogglerDemo02"  aria-expanded="false" aria-label="Toggle navigation" (click)="isCollapsed = !isCollapsed" [attr.aria-expanded]="!isCollapsed" aria-controls="navbarTogglerDemo02">
    <span class="navbar-toggler-icon"></span>
  </button>

  <div class="collapse navbar-collapse" id="navbarTogglerDemo02" [ngbCollapse]="isCollapsed">
    <ul class="navbar-nav mr-auto mt-2 mt-lg-0">
      <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="#">Link</a>
      </li>
      <li class="nav-item">
        <a class="nav-link disabled" href="#">Disabled</a>
      </li>
    </ul>
    <form class="form-inline my-2 my-lg-0">
      <input class="form-control mr-sm-2" type="search" placeholder="Search">
      <button class="btn btn-outline-success my-2 my-sm-0" type="submit">Search</button>
    </form>
  </div>
</nav>

组件ts文件：

export class AppComponent {
  isCollapsed = false;
}

在angular-cli.json中添加bootstrap css文件：

"styles": [
        "../node_modules/bootstrap/dist/css/bootstrap.min.css",
        "styles.css"
      ],

在主模块中添加：

import {NgbModule} from '@ng-bootstrap/ng-bootstrap';

imports: [
  NgbModule.forRoot()
]

这将像一个魅力.

使用ng-bootstrap的主要优点是你可以消除jquery和popper等其他js库的依赖关系,你也可以为bootstrap编写组件.