ng-bootstrap无法在angular 4中工作 [英] ng-bootstrap not working in angular 4

问题描述

我是angular 4的新手，我正在尝试配置引导程序. 我安装了ng-bootstrap:

https://ng-bootstrap.github.io/#/getting-started

我在页面上都喜欢，但在页面上看不到引导. 这是我的代码:

src/app/app.module.ts

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

import { AppComponent } from './app.component';
import { FormsModule } from '@angular/forms';
import {NgbModule} from '@ng-bootstrap/ng-bootstrap';

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

src/app/app.component.html

<div class="container">

<h1 class="text-primary">{{title}} </h1>

<h2 class="text-primary">My Heroes</h2>
<ul class="heroes">
  <li *ngFor="let hero of heroes"
    [class.selected]="hero === selectedHero"
    (click)="onSelect(hero)">
    <span class="badge">{{hero.id}}</span> {{hero.name}}
   </li>
</ul>

<div class="alert alert-success" role="alert">
 <strong>Well done!</strong> You successfully read this important alert 
   message.
</div>

<div *ngIf="selectedHero">
  <h2>{{selectedHero.name}} details!</h2>
<div><label>id: </label>{{selectedHero.id}}</div>
<div>
  <label>name: </label>
  <input [(ngModel)]="selectedHero.name" placeholder="name"/>
</div>

我也在index.html中尝试了一些代码，但是它不起作用，

对于此行，我希望看到一些颜色:

<h1 class="text-primary">{{title}} </h1>

当我检查html的标头时，找不到引导程序的任何引用. 有什么帮助吗? 谢谢

解决方案

在您提到的页面中，ng-bootstrap提到了bootstrap CSS作为依赖项.因此，是单独加载的.

如果您使用Angular CLI创建应用程序，则可以按照此官方指南添加

更新:

如注释中所述，将CSS添加到.angular-cli.json中的styles(或对此文件进行任何其他更改)将要求您重新启动ng serve或ng build --watch(如果已经运行). /p>

更新2(当前推荐的方法):

对于Angular 6及更高版本，您可以使用此解决方案.

转到styles.css并添加此行

@import "~bootstrap/dist/css/bootstrap.css";

另请参阅它的工作原理:

https://ng-bootstrap.github.io/#/getting-started

I did all like on the page, but I don't see the bootstrap on my page. Here is my code:

src/app/app.module.ts

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

import { AppComponent } from './app.component';
import { FormsModule } from '@angular/forms';
import {NgbModule} from '@ng-bootstrap/ng-bootstrap';

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

src/app/app.component.html

<div class="container">

<h1 class="text-primary">{{title}} </h1>

<h2 class="text-primary">My Heroes</h2>
<ul class="heroes">
  <li *ngFor="let hero of heroes"
    [class.selected]="hero === selectedHero"
    (click)="onSelect(hero)">
    <span class="badge">{{hero.id}}</span> {{hero.name}}
   </li>
</ul>

<div class="alert alert-success" role="alert">
 <strong>Well done!</strong> You successfully read this important alert 
   message.
</div>

<div *ngIf="selectedHero">
  <h2>{{selectedHero.name}} details!</h2>
<div><label>id: </label>{{selectedHero.id}}</div>
<div>
  <label>name: </label>
  <input [(ngModel)]="selectedHero.name" placeholder="name"/>
</div>

I tried also some code in the index.html, but it does not work,

for this line I am expecting to see some color:

<h1 class="text-primary">{{title}} </h1>

I don't find any reference of bootstrap when I check the header of the html. Any help, please? Thanks

解决方案

In the page you mentioned, ng-bootstrap mentions bootstrap CSS as a dependency. So that's loaded separately.

If you are using Angular CLI to create your application, you can follow this official guide to add it,

Update:

As mentioned in the comment, adding the CSS to styles in .angular-cli.json (or any other changes to this file) will require you to restart your ng serve or ng build --watch if you have either already running.

Update 2 (Current Recommended Approach):

For Angular 6 and higher you can use this solution.

Go to styles.css and add this line

@import "~bootstrap/dist/css/bootstrap.css";

See also how this works under the hood:

https://blog.angularindepth.com/this-is-how-angular-cli-webpack-delivers-your-css-styles-to-the-client-d4adf15c4975

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