twitter-bootstrap Bootstrap 导航栏无法正常工作：AngularCLI

Bootstrap Navbar not working correctly: AngularCLI

提问by FrankTheTank

I included bootstrap into my angularcli project but when I try to include a navbar none of the elements are working correctly. I am using a standard boostrap navbar example from the website but it looks weird:

我将引导程序包含在我的 angularcli 项目中，但是当我尝试包含导航栏时，所有元素都无法正常工作。我正在使用网站上的标准 boostrap 导航栏示例，但它看起来很奇怪：

What is wrong with my project that is making the navbar not load correctly?

我的项目有什么问题导致导航栏无法正确加载？

navbar.component.html

导航栏.component.html

<nav class="navbar navbar-toggleable-md navbar-light bg-faded">
  <button class="navbar-toggler navbar-toggler-right" type="button" data-toggle="collapse" data-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
    <span class="navbar-toggler-icon"></span>
  </button>
  <a class="navbar-brand" href="#">Navbar</a>

  <div class="collapse navbar-collapse" id="navbarSupportedContent">
    <ul class="navbar-nav mr-auto">
      <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="text" placeholder="Search">
      <button class="btn btn-outline-success my-2 my-sm-0" type="submit">Search</button>
    </form>
  </div>
</nav>

.angular-cli.json

.angular-cli.json

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

采纳答案by Ragavan Rajan

There are some known issues in bootstrap 4 especially in navbar implemenation

bootstrap 4 中存在一些已知问题，尤其是在导航栏实现中

Hence uou have to install bootstrap [email protected]

因此你必须安装引导程序 [email protected]

if you are using npm then the following libraries is best recommonded

如果您使用的是 npm，那么最好推荐以下库

 npm install [email protected] --save

npm install [email protected] tether jquery --save

In .angular-cli.json file add the dependencies

在 .angular-cli.json 文件中添加依赖项

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

"scripts":[
"../node_modules/jquery/dist/jquery.js",
"../node_modules/tether/dist/js/tether.js",
"../node_modules/bootstrap/dist/js/bootstrap.js"
],

Use the following HTML

使用以下 HTML

 <nav class="navbarnavbar-inverse">
    <div class="container">
    <div class="navbar-header">
    <button type="button" class="navbar-togglecollapsed" data-toggle="collapse" data-target="#navbar" aria-expanded="false" aria-controls="navbar">
    <span class="sr-only">Togglenavigation</span>
    <span class="icon-bar"></span>
    <span class="icon-bar"></span>
    <span class="icon-bar"></span>
    </button>
    <a class="navbar-brand" href="#">Angular5Website</a>
    </div>
    <div id="navbar" class="collapsenavbar-collapse">
    <ul class="navnavbar-nav">
    <li class="active"> <a href="#">Home</a></li>
    <li><a href="#about">About</a></li>
    <li><a href="#contact">Contact</a></li>
    </ul>
    </div><!--/.nav-collapse-->
    </div>
    </nav>

回答by ConnorsFan

The code below shows how to implement the navbar in Angular with ng-bootstrapand Bootstrap 4. You can see it at work in this plunker.

下面的代码显示了如何使用ng-bootstrap和 Bootstrap 4在 Angular 中实现导航栏。您可以在这个 plunker 中看到它的工作情况。

• The ng-bootstraplibrary is developped for Angular, and does not require jQuery
• Using Bootstrap 4, you should replacenavbar-toggleable-mdwith navbar-expand-md
• The ngbCollapsedirective is used to show/hide the dropdown menu

• 该ng-bootstrap库是为 Angular 开发的，不需要 jQuery
• 使用 Bootstrap 4，您应该替换navbar-toggleable-md为navbar-expand-md
• 该ngbCollapse指令用于显示/隐藏下拉菜单

<nav class="navbar navbar-expand-md navbar-light bg-faded">
  <button class="navbar-toggler navbar-toggler-right" type="button" (click)="isNavbarCollapsed = !isNavbarCollapsed" data-toggle="collapse" data-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
      <span class="navbar-toggler-icon"></span>
  </button>
  <a class="navbar-brand" href="#">Navbar</a>
  <div [ngbCollapse]="isNavbarCollapsed" class="navbar-collapse" id="navbarSupportedContent">
    <ul class="navbar-nav mr-auto">
      <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="text" placeholder="Search">
      <button class="btn btn-outline-success my-2 my-sm-0" type="submit">Search</button>
    </form>
  </div>
</nav>

回答by Aleksandar Petrovic

navbar.component.html:

导航栏.component.html：

<nav class="navbar navbar-default">
   <div class="container-fluid">
      <div class="navbar-header">
         <button type="button" class="navbar-toggle" (click)="toggleNavbarCollapsing()">
            <span class="icon-bar"></span>
            <span class="icon-bar"></span>
            <span class="icon-bar"></span>
         </button>
         <a routerLink="/" class="navbar-brand">Navbar</a>
      </div>
      <div class="navbar-collapse" [class.collapse]="navbarCollapsed">
      ...

navbar.component.ts:

导航栏.component.ts：

navbarCollapsed = true;

toggleNavbarCollapsing() {
    this.navbarCollapsed = !this.navbarCollapsed;
}