Angular 9 条路线给出空白页面且没有错误

Question

我刚刚升级到 Angular 9 并使用延迟加载创建了一些子路由。在这些更改之前，我的项目和我的路由运行良好，但在这两个更改之后，只有我的 HomeComponent 路由（路径：“”）正常工作，但是如果我尝试单击其他路由的链接（使用 routerLink），它根本不会重定向，如果我在浏览器中手动编写路由，它会给我一个没有错误的空白页面。

总结：项目和路由运行良好，但在我创建angular延迟加载路由后，唯一有效的路由是默认路由(HomeComponent)，如果我尝试单击链接转到其他路线，则没有任何反应，如果我在浏览器中手动输入这些路线，它会给我一个没有错误的空白页面。

app.module.ts


@NgModule({
  declarations: [
    AppComponent,
    HomeComponent,
  ],
  imports: [
    SharedModule,
    HomeModule,
    Mugan86GoogleAnalyticsModule.forRoot({analyticsId: 'XXX', showLog: false}),
    AnimateOnScrollModule.forRoot(),
    BrowserModule.withServerTransition({appId: 'serverApp'}),
    ServiceWorkerModule.register('ngsw-worker.js', {enabled: environment.production}),
  ],
  providers: [
    {provide: ErrorHandler, useClass: RollbarErrorHandler},
    {provide: RollbarService, useFactory: rollbarFactory}
  ],
  bootstrap: [AppComponent],
  exports: [
    SharedModule,
    HomeModule,
  ]
})
export class AppModule {
}

shared.module.ts

@NgModule({
  declarations: [
    FooterComponent,
    LoadingBallsComponent,
    NavbarComponent,
    ScrolledToDirective,
    TrackScrollDirective,
    TopArrowComponent,
    SnackbarComponent,
  ],
  imports: [
    BrowserModule,
    RouterModule,
    AppRoutingModule,
    BrowserAnimationsModule,
    CommonModule,
    FilterModule,
    ReactiveFormsModule,
    FormsModule,
    RecaptchaModule,
    AnimateOnScrollModule
  ],
  exports: [
    BrowserModule,
    CommonModule,
    FooterComponent,
    LoadingBallsComponent,
    NavbarComponent,
    FilterModule,
    AppRoutingModule,
    ReactiveFormsModule,
    FormsModule,
    RecaptchaModule,
    AnimateOnScrollModule,
    ScrolledToDirective,
    TrackScrollDirective,
    TopArrowComponent,
    SnackbarComponent,
    RouterModule,
    BrowserAnimationsModule]
})
export class SharedModule {
}

home.module.ts

@NgModule({
  declarations: [
    CharacteristicsComponent,
    ContactComponent,
    HeaderComponent,
    MainDescriptionComponent,
    InfluencerPromotionComponent,
    SocialMediaComponent,
    BoxItemComponent,
    BandIconComponent,
    ServicesComponent,
  ],
  imports: [
    SharedModule,
  ],
  exports: [
    CharacteristicsComponent,
    ContactComponent,
    HeaderComponent,
    MainDescriptionComponent,
    InfluencerPromotionComponent,
    SocialMediaComponent,
    BoxItemComponent,
    BandIconComponent,
    ServicesComponent
  ]
})
export class HomeModule { }

app-routing.module.ts

export const routes: Routes = [
  {path: '', pathMatch: 'full', component: HomeComponent}, // no route specified
  {path: '', component: HomeComponent},
  {path: 'sobre-nosotros', loadChildren: () => import('./components/about-us/about-us.module').then(m => m.AboutUsModule)},
  {
    path: 'preguntas-frecuentes',
    loadChildren: () => import('./components/common-questions/common-questions.module').then(m => m.CommonQuestionsModule)
  },
  {path: 'sitemap', loadChildren: () => import('./components/sitemap/sitemap.module').then(m => m.SitemapModule)},
  {path: '**', component: HomeComponent}, // fallback route (not found - 404)
];

@NgModule({
  imports: [RouterModule.forRoot(routes, {initialNavigation: 'enabled', preloadingStrategy: PreloadAllModules})],
  exports: [RouterModule]
})
export class AppRoutingModule {
}

作为示例，我将展示其中一条不起作用的路由的模块和路由模块：

关于我们-module.ts

@NgModule({
  declarations: [AboutUsComponent],
  imports: [
    AppModule,
    CommonModule,
    AboutUsRoutingModule,
  ]
})
export class AboutUsModule { }

关于我们-routing.module.ts

const routes: Routes = [{path: '', component: AboutUsComponent}];

@NgModule({
  imports: [RouterModule.forChild(routes)],
  exports: [RouterModule]
})
export class AboutUsRoutingModule {
}

额外信息

tsconfig.json（angular编译器选项）

  "angularCompilerOptions": {
    "enableIvy": true,
    "fullTemplateTypeCheck": true,
    "strictInjectionParameters": true
  }

angular.json (aot)

"aot": true,

package.json（查看版本）

"dependencies": {
    "@angular/animations": "~9.1.9",
    "@angular/common": "~9.1.9",
    "@angular/compiler": "~9.1.9",
    "@angular/core": "~9.1.9",
    "@angular/forms": "~9.1.9",
    "@angular/platform-browser": "~9.1.9",
    "@angular/platform-browser-dynamic": "~9.1.9",
    "@angular/platform-server": "~9.1.9",
    "@angular/router": "~9.1.9",
    "@angular/service-worker": "~9.1.9",
    "@josee9988/filter-pipe-ngx": "^1.1.0",
    "@nguniversal/express-engine": "^9.1.1",
    "animate.css": "^3.7.2",
    "emailjs-com": "^2.4.1",
    "express": "^4.15.2",
    "mugan86-ng-google-analytics": "^1.1.1",
    "ng-recaptcha": "^5.0.0",
    "ng2-animate-on-scroll": "^2.0.0",
    "rollbar": "^2.16.2",
    "rxjs": "~6.5.5",
    "tslib": "^1.13.0",
    "zone.js": "~0.10.2"
  },
  "devDependencies": {
    "@angular-devkit/build-angular": "~0.901.7",
    "@angular/cli": "~9.1.7",
    "@angular/compiler-cli": "~9.1.9",
    "@angular/language-service": "~9.1.9",
    "@nguniversal/builders": "^9.1.1",
    "@types/express": "^4.17.0",
    "@types/jasmine": "~3.3.8",
    "@types/jasminewd2": "~2.0.3",
    "@types/node": "^12.11.1",
    "codelyzer": "^5.1.2",
    "jasmine-core": "~3.4.0",
    "jasmine-spec-reporter": "~4.2.1",
    "karma": "^5.0.9",
    "karma-chrome-launcher": "~2.2.0",
    "karma-coverage-istanbul-reporter": "~2.0.1",
    "karma-jasmine": "~2.0.1",
    "karma-jasmine-html-reporter": "^1.5.4",
    "protractor": "^7.0.0",
    "ts-node": "~7.0.0",
    "tslint": "~5.15.0",
    "typescript": "~3.8.3"

我有另一个使用 Ivy 和子路由的项目，我只是按照与上述项目相同的步骤操作，但我发现了所描述的问题。

编辑

我刚刚删除了每个路由的延迟加载和 modules/routing 模块，应用程序再次运行。所以肯定 问题是由延迟加载 特性引起的。

Answer 1

请删除前两个 Home-Routes (HomeComponent)。

在 app-routing.module 中，您可以启用路由调试：

@NgModule({
imports: [
      RouterModule.forRoot(routes, {enableTracing: true}),

也许你可以移除{initialNavigation: 'enabled', preloadingStrategy: PreloadAllModules}。

您的代码看起来不错。希望调试能给大家更多信息

AppRoutingModule 只能在 AppModule 中使用。不允许在延迟加载的子模块之一中引用 AppRoutingModule。

在 AppModule 中导入 BrowserModule、BrowserAnimationsModule 和 AppRoutingModule。

尽量避免共享大模块。参见：Lazy Loading Angular - Code Splitting NgModules with Webpack

Answer 2

禁用常春藤选项并检查。它和我一起工作

"enableIvy": false,

Angular 9 条路线给出空白页面且没有错误

Angular 9 routes giving blank pages with no errors

angular-ui-router

angular

angular-routerlink

angular-ivy

angular9

编辑