Bootstrap 4 Navbar在Angular4中没有崩溃

Question

我在Angular 4项目中使用Bootstrap 4和Ng-Bootstrap,

我用这种方式链接了我的angular-cli.json中的que bootstrap.css

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

并在我的app.module中导入了NgbModule,看起来像这样

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { NgbModule } from '@ng-bootstrap/ng-bootstrap';

import { AppComponent } from './app.component';

@NgModule({
  declarations: [
    AppComponent
  ],
  imports: [
    BrowserModule,
    NgbModule.forRoot()
  ],
  providers: [],
  bootstrap: [AppComponent]
})
export class AppModule { }

我做了一个Navbar从bootstrap网站复制文档并添加了ng-bootstrap的toggle组件(它工作正常)代码看起来像这样

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

  <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>
        <div ngbDropdown class="d-inline-block">
          <div class="nav-link" id="dropdownBasic1" ngbDropdownToggle>Toggle 
dropdown</div>
          <div ngbDropdownMenu aria-labelledby="dropdownBasic1">
            <button class="dropdown-item">Action - 1</button>
            <button class="dropdown-item">Another Action</button>
            <button class="dropdown-item">Something else is here</button>
          </div>
        </div>
      </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" 
aria-label="Search">
      <button class="btn btn-outline-success my-2 my-sm-0" 
type="submit">Search</button>
    </form>
  </div>
</nav>

问题开始时,我缩小窗口,切换功能,当按下按钮折叠导航栏时,它不起作用.

我尝试安装和链接jquery和popper以及bootstrap的js文件,但它仍然不起作用,实际的angular-cli.json看起来像这样

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

      ],

我究竟做错了什么？

Answer 1

要使用角度,您需要此修复程序

首先在你的班级中定义它 public navbarCollapsed = true;

然后按下你的按钮

<button class="navbar-toggler" type="button" (click)="navbarCollapsed = !navbarCollapsed" [attr.aria-expanded]="!navbarCollapsed" aria-controls="navbarContent" aria-expanded="false" aria-label="Toggle navigation">
    <span class="navbar-toggler-icon"></span>
</button>

你也需要将它添加到你的崩溃div中

<div class="collapse navbar-collapse" [ngbCollapse]="navbarCollapsed" id="navbarSupportedContent"> 

现在你不需要jquery,popper或bootstrap.js

你可以在这里找到关于这个问题的更多信息.

还检查ng-bootstraps工作演示页面代码链接.