Angular2 - “路由器插座”不是已知元素

Question

我创建了具有深度子路径的路线。我将<router-outlet> 添加到包装到 NgModule 中的 AdminComponent 组件中。但是刷新页面后我得到了这个错误：

'router-outlet' is not a known element

可能是因为我忘记将某些模块导入到 admin.module.ts

请帮忙。谢谢。

app.routes.ts

export const routes: Routes = [
    {
        path: '',
        component: AppComponent,
        children: [
            {
                path: '',
                component: LoginComponent
            },
            {
                path: 'admin',
                component: AdminComponent
            },
            {
                path: 'user',
                component: UserComponent
            },
            {
                path: 'there',
                component: ThereComponent
            }
        ]
    }
]

app.module.ts

@NgModule({
    imports: [
        BrowserModule,
        AppRoutes,
        FormsModule,
        ReactiveFormsModule,
        HttpModule,
        RouterModule,
        TranslateModule.forRoot({
            provide: TranslateLoader,
            useFactory: (http: Http) => {
                return new TranslateStaticLoader(http, './src/assets/i18n', '.json')
            },
            deps: [Http]
        }),
        UserComponentModule,
        AdminComponentModule,
        LoginComponentModule,
        ThereComponentModule,
        DashboardComponentModule
    ],
    declarations: [
        AppComponent
    ],
    providers: [
        FormBuilder
    ],
    bootstrap: [AppComponent]
})

admin.component.ts 和 admin.module.ts

//  admin.component.ts
import {Component} from "@angular/core";

@Component({
    selector: 'admin',
    template: "<router-outlet></router-outlet>",
})

export class AdminComponent {
    constructor() {

    }
}

//  admin.module.ts
const ADMIN_DECLARATION = [
    AdminComponent
];

@NgModule({
    imports: [
        BrowserModule,
        TranslateModule,
        FormsModule,
        ReactiveFormsModule
    ],
    declarations: [
        ADMIN_DECLARATION
    ],
    exports: [
        ADMIN_DECLARATION
    ],
    providers: [
        TranslateService,
        FormBuilder
    ]
})

export class AdminComponentModule {

}

Answer 1

AdminComponent 是AdminComponentModule 的一部分，您还没有在AdminComponentModule 模块中导入RouterModule：

//  admin.component.ts
import {Component} from "@angular/core";

@Component({
    selector: 'admin',
    template: "<router-outlet></router-outlet>",
})

export class AdminComponent {
    constructor() {

    }
}

//  admin.module.ts
const ADMIN_DECLARATION = [
    AdminComponent
];

@NgModule({
    imports: [
        BrowserModule,
        TranslateModule,
        RouterModule,
        FormsModule,
        ReactiveFormsModule
    ],
    declarations: [
        ADMIN_DECLARATION
    ],
    exports: [
        ADMIN_DECLARATION
    ],
    providers: [
        TranslateService,
        FormBuilder
    ]
})

export class AdminComponentModule {

}

Answer 2

添加此代码

import { provideRoutes} from '@angular/router';

给你的app.module.ts

为我工作。

Answer 3

您没有导出 RouterModule。

@NgModule({
  imports: [RouterModule.forRoot(routes)],
  exports: [RouterModule]
})

Answer 4

在你的 app.module.ts 文件中

import { routing } from './app-routing.module';

//and then write within imports
@NgModule({
  declarations: [
    AppComponent,
    NavbarComponent
  ],
  imports: [
    BrowserModule,
    **routing**,
    EmployeeModule
  ],

Answer 5

这对我有用：

在 AppModule 中添加架构 [NO_ERRORS_SCHEMA]。

import { NO_ERRORS_SCHEMA } from '@angular/core';

@NgModule({
  schemas : [NO_ERRORS_SCHEMA]  
})

Answer 6

app.module.ts

import { MyRoutingModule } from './MyRoutingModulePath';

  @NgModule({
  imports: [
    MyRoutingModule
  ])