ng-bootstrap ngbDropdown 在 angular 4 中不起作用 [英] ng-bootstrap ngbDropdown not working in angular 4

问题描述

在我的 angular 4 应用程序中，来自 ng-bootstrap 的 ngbDropdown-Element 不起作用.

我已经为这种情况安装了以下 npm 模块:

"@ng-bootstrap/ng-bootstrap": "^1.0.0-alpha.22","bootstrap": "4.0.0-alpha.6","bootstrap-sass": "^3.3.7",

我的 app.module.ts 看起来像这样:

import { BrowserModule } from "@angular/platform-b​​rowser"从@angular/core"导入 { NgModule };从@angular/forms"导入 { FormsModule };从@angular/http"导入 { HttpModule };import { AppComponent } from "./app.component";import { FileitHeaderComponent } from "./fileit-header/fileit-header.component";从ng2-translate"导入{TranslateModule}；import { CCACampaignComponent } from "./cca-campaign/cca-campaign.component";从@ng-bootstrap/ng-bootstrap"导入 {NgbModule}；@NgModule({声明: [应用组件，FileitHeader 组件，CCACampaign 组件],进口:[浏览器模块，表单模块，Http模块，TranslateModule.forRoot(),NgbModule.forRoot()],提供者:[]，引导程序:[AppComponent]})导出类 AppModule { }

在 CCA 活动中，我尝试使用 ng-bootstrap 的演示:

<button class="btn btn-outline-primary" id="dropdownMenu1" ngbDropdownToggle>切换下拉菜单</button><div class="dropdown-menu" aria-labelledby="dropdownMenu1"><button class="dropdown-item">Action - 1</button><button class="dropdown-item">另一个操作</button><button class="dropdown-item">这里还有别的东西</button>

但不幸的是，这段代码的结果非常糟糕:

当我点击它时什么也没有发生......

解决方案

tl;dr;安装 Bootstrap 4 CSS.

ng-bootstrap 需要 Bootstrap 4 如中所述入门"页面.出于某种原因，您有 "bootstrap-sass": "^3.3.7" 所以看起来您正在混合 Bootstrap 版本，并且可能正在有效地使用 Bootstrap 3.

使用 Bootstrap 4 CSS，一切正常，如演示页面所示(您可以从中派生出 plunkers):https://ng-bootstrap.github.io/#/components/dropdown

At my angular 4 application is the ngbDropdown-Element from ng-bootstrap not working.

I have installed the following npm modules for this case:

"@ng-bootstrap/ng-bootstrap": "^1.0.0-alpha.22", "bootstrap": "4.0.0-alpha.6", "bootstrap-sass": "^3.3.7",

My app.module.ts is looking like this:

import { BrowserModule } from "@angular/platform-browser"
import { NgModule } from "@angular/core";
import { FormsModule } from "@angular/forms";
import { HttpModule } from "@angular/http";

import { AppComponent } from "./app.component";
import { FileitHeaderComponent } from "./fileit-header/fileit-header.component";
import {TranslateModule} from "ng2-translate";
import { CCACampaignComponent } from "./cca-campaign/cca-campaign.component";
import {NgbModule} from "@ng-bootstrap/ng-bootstrap";


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

And in the CCA Campaign I am trying to use the Demo of ng-bootstrap:

<div ngbDropdown class="d-inline-block">
    <button class="btn btn-outline-primary" id="dropdownMenu1" ngbDropdownToggle>Toggle dropdown</button>
        <div class="dropdown-menu" aria-labelledby="dropdownMenu1">
            <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>

But the result of this code is unfortunately very bad:

and nothing happens when I click on it ...

解决方案

tl;dr; install Bootstrap 4 CSS.

ng-bootstrap requires Bootstrap 4 as documented on the "Getting Started" page. For some reason you've got "bootstrap-sass": "^3.3.7" so it looks like you are mixing Bootstrap versions and might be using Bootstrap 3, effectively.

With the Bootstrap 4 CSS things work perfectly fine as shown on the demo page (and plunkers you can fork from it): https://ng-bootstrap.github.io/#/components/dropdown

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