javascript - 获取 'ngbCollapse' 因为它不是 'div' 的已知属性。将组件移入子模块后出错

Question

错误

compiler.js:215 Uncaught Error: Template parse errors: Can't bind to 'ngbCollapse' since it isn't a known property of 'div'. ("][ngbCollapse]="isHidden">

我有一个 NavbarComponent 和一个 FooterComponent，我想将它们移到 SharedModule 中，以保持根 app.module 更干净。

app.module

import { AdminComponent } from './admin/admin.component';
// import { NavbarComponent } from './navbar/navbar.component';
// import { FooterComponent } from './footer/footer.component';

// Modules
import { DashboardModule } from './dashboard/dashboard.module';
import { HomeModule } from './home/home.module';

@NgModule({
  declarations: [
    AppComponent,
    LoginComponent,
    RegisterComponent,
    PasswordResetComponent,
    ResetPasswordComponent,
    AdminComponent,
    // NavbarComponent,
    // FooterComponent,

share.module

但是，一旦我将这些组件移至此处并正确更新它们的路径 ./ -> ../ 应用程序就会中断。

import { NgModule } from '@angular/core';
import { CommonModule } from '@angular/common';

import { NavbarComponent } from '../navbar/navbar.component';
import { FooterComponent } from '../footer/footer.component';
import { TermsComponent } from './terms.component';
import { PageNotFoundComponent } from './not-found.component';
import { PrivacyPolicyComponent } from './privacy-policy.component';

@NgModule({
  imports: [
    CommonModule
  ],
  declarations: [
    NavbarComponent,
    FooterComponent,
    TermsComponent,
    PageNotFoundComponent,
    PrivacyPolicyComponent
  ]
})
export class SharedModule { }

navbar.component.ts

import { Component, OnInit } from '@angular/core';
import { AuthService } from '../auth.service';
import { environment } from '../../environments/environment';

@Component({
  selector: 'app-navbar',
  templateUrl: './navbar.component.html',
  styleUrls: ['./navbar.component.scss']
})
export class NavbarComponent implements OnInit {
  isHidden = true;
  oauthUrl = this.authService.generateOauthUrl();

  constructor(public authService: AuthService) { }

  ngOnInit() {
  }

  logout() {
    sessionStorage.clear();
  }
}

然后是 navbar.component.html

中的 [ngbCollapse] 几行

<div *ngIf="!authService.isLoggedIn()" class="collapse navbar-collapse" id="navbarSupportedContent" [ngbCollapse]="isHidden">

我认为这与相对路径有关，有什么想法吗？

Answer 1

要在 Angular 模板中使用 ng-bootstrap 组件和指令，您需要导入 NgbModule。在您的情况下，您应该将其导入 SharedModule。此外，为了在应用程序的其他部分使用共享组件，您应该将它们从 SharedModule 中导出并在组件要被调用时在模块中导入 SharedModule用过。

shared.module.ts

...
import { NgbModule } from '@ng-bootstrap/ng-bootstrap';

@NgModule({
  imports: [
    CommonModule,
    NgbModule
  ],
  declarations: [
    NavbarComponent,
    FooterComponent,
    TermsComponent,
    PageNotFoundComponent,
    PrivacyPolicyComponent
  ],
  exports: [
    NavbarComponent,
    FooterComponent,
    TermsComponent,
    PageNotFoundComponent,
    PrivacyPolicyComponent
  ]
})
export class SharedModule { }

app.module.ts

import { SharedModule } from './shared/shared.module';
...

@NgModule({
  imports: [
    SharedModule,
    ...
  ],
  ...
})

注意:如果你想在 SharedModule 之外的模板中使用 ng-bootstrap 组件和指令，你应该将 NgbModule 添加到导出 SharedModule。