Question

我正在使用Angular7和Botstrap4。尝试在我的应用程序中添加导航栏，当导航栏折叠时，切换按钮不起作用。

我不想添加ng-bootstrap，仅添加bootstrap4。

这是我的代码

<nav class="navbar navbar-expand-lg navbar-light bg-light">
  <a class="navbar-brand" href="#">{{title}}</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" routerLink="home">Home <span class="sr-only">(current)</span></a>
      </li>
      <li class="nav-item">
        <a class="nav-link" routerLink="about">About Us</a>
      </li>
      <li class="nav-item">
        <a class="nav-link" routerLink="contact">Contact Us</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>

Answer 1

我认为您忘记在已经放置bootstrap.min.js的{{1}}中包含jquery.min.js，popper.min.js和angular.json文件链接。

bootstrap.min.css

Answer 2

此问题的简单解决方案是将jquery，popper和bootstrap的脚本导入到应用程序的index.html文件中。这样做会使导航栏下拉菜单中的导航链接折叠。

我这样做了，对我来说效果很好。参见下面的示例

<!doctype html>
<html lang="en">

<head>
  <meta charset="utf-8">
  <title>TestApp</title>
  <base href="/">

  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link rel="icon" type="image/x-icon" href="favicon.ico">
  <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css">



  <script src="https://code.jquery.com/jquery-3.4.1.slim.min.js"
    integrity="sha384-J6qa4849blE2+poT4WnyKhv5vZF5SrPo0iEjwBvKU7imGFAV0wwj1yYfoRSJoZ+n" crossorigin="anonymous">
  </script>
  <script src="https://cdn.jsdelivr.net/npm/popper.js@1.16.0/dist/umd/popper.min.js"
    integrity="sha384-Q6E9RHvbIyZFJoft+2mJbHaEWldlvI9IOYy5n3zV9zzTtmI3UksdQRVvoxMfooAo" crossorigin="anonymous">
  </script>
  <script src="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/js/bootstrap.min.js"
    integrity="sha384-wfSDF2E50Y2D1uUdj0O3uMBJnjuUD4Ih7YwaYd1iqfktj0Uod8GCExl3Og8ifwB6" crossorigin="anonymous">
  </script>
</head>

<body>
  <app-root></app-root>
</body>

</html>

导航按钮在bootstrap 4和angular 7应用中无法使用导航按钮

2 个答案: