Question

我有一个使用急切加载的完整角度应用程序。我想将其转换为延迟加载，但是由于我对所有路由都保持警惕，并且它们都是到受保护的一条主路由的子路由，所以我不知道是否有可能做到这一点并且仍然使其起作用就像渴望加载一样。

这是我在app-routing.module中的路由数组：

// Routing array - set routes to each html page
const appRoutes: Routes = [
  { path: 'login/:id', canActivate: [AuthGuard], children: [] },
  { path: '', canActivateChild: [AuthGuard], children: [
    { path: '', redirectTo: '/courses', pathMatch: 'full' },
    { path: 'courses', component: CourseListComponent,  pathMatch: 'full'},
    { path: 'courses/:courseId', component: CourseDetailComponent, pathMatch: 'full' },
    { path: 'courses/:courseId/unit/:unitId', component: CoursePlayComponent,
      children: [
        { path: '', component: CourseListComponent },
        { path: 'lesson/:lessonId', component: CourseLessonComponent, data:{ type: 'lesson'} },
        { path: 'quiz/:quizId', component: CourseQuizComponent, data: {type: 'quiz'} }
      ]}
    ]},
  { path: 'welcome', component: LandingPageComponent, pathMatch: 'full' },
  { path: '**', component: PageNotFoundComponent, pathMatch: 'full' }];

我想知道的是是否可以通过延迟加载来实现这一点，如果可以的话，我想知道主要思想或我需要知道的东西。

在所有教程中，我都从未遇到过这种事情。非常感谢

Answer 1

我的一个应用程序中的示例代码：

const routes: Routes = [
  {
    path: 'login',
    component: SignupLoginMainContainerComponent,
    canActivate: [AuthGuard],
  },
  {
    path: 'error',
    component: ErrorComponent
  },
  {
    // lazy loading payment module
    path: 'payment',
    loadChildren: './modules/payment/payment.module#PaymentModule'
  },
  {
    // lazy loading private module
    path: '',
    loadChildren: './modules/private/private.module#PrivateModule',
    canLoad: [AuthGuard]
  },
  {path: '**', redirectTo: '/login'},
];

AuthGuard实现：

export class AuthGuard implements CanActivate, CanLoad {

canActivate(
    next: ActivatedRouteSnapshot,
    state: RouterStateSnapshot
  ): Observable<boolean> | Promise<boolean> | boolean {
    return (some condition) ? true : false
  }

canLoad(route: Route): boolean {
   return (some condition based on route etc) ? true : false
 }

}

私有模块拥有路由文件，该文件进一步加载了更多子模块：

const routes: Routes = [
  {
    path: '',
    component: PrivateComponent,
    canActivateChild: [AuthGuard],
    children: [
      {
        path: 'childOne',
        loadChildren: '../child-one/child-one.module#ChildOneModule',
        canLoad: [AuthGuard],
      },
      {
        path: 'childTwo',
        loadChildren: '../child-two/child-two.module#ChildTwoModule',
        canLoad: [AuthGuard],
      },
      {
        path: '',
        redirectTo: '/dashboard',
        pathMatch: 'full',
      },
    ],
  },
];

另一个示例可以在https://github.com/ashishgkwd/bot/tree/24-lazy-loading-modules中找到。 AdminModule已被延迟加载到该文件中。

Answer 2

        For lazy loading you should use:
   import {ComponentName} from 'component path';     
        const routes: Routes = [

      //for module 

            {
                path: 'path_Name',
                loadChildren: './modules/abc/abc.module#AbcModule'
            },

       //for component
            {
              path: 'browser',
            component: ComponentName
         },
    ];

Answer 3

标题为“ 将急切加载转换为延迟加载”。

我分享了通过4个值得关注的步骤将渴望加载转换为延迟加载的方式。

第1步：通过命令ng g组件文件夹内的模块ModuleName创建模块

import { NgModule } from '@angular/core';
import { CommonModule } from '@angular/common';
import { RouterModule, Routes } from '@angular/router';
import { AnalysisStatusComponent } from './analysis-status.component';
import { ShareComponentModule } from '../../share-component/share-component.module';
const routes: Routes = [
  {
    path: '',
    component: AnalysisStatusComponent
  }
];

@NgModule({
  declarations: [
    AnalysisStatusComponent
  ],
  imports: [
    RouterModule.forChild(routes),
    CommonModule,
    ShareComponentModule
  ]
})
export class AnalysisStatusModule { }

第2步：为模块添加路由为

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

步骤3：注释掉应用程序模块中的组件

@NgModule({
   declarations: [
      AppComponent,
      NavBarComponent,
      LoginComponent,
      //AnalysisStatusComponent,
      PairsPipe,
      MainComponent
   ],

第4步：在应用程序路线中更新路线

const routes: Routes = [
  //{ path: 'dashboard/analysis-status', component: AnalysisStatusComponent },
  { path: 'dashboard/analysis-status', loadChildren: './dashboard/analysis-status/analysis-status.module#AnalysisStatusModule' },
}

Answer 4

谢谢大家的回答。我设法将路由成功转换为延迟加载。这是代码：

应用程序路由模块

import { NgModule } from '@angular/core';
import { Routes, RouterModule, Router } from '@angular/router';
import { AuthGuard } from './auth.guard';

import { AppComponent } from './app.component';
import { PageNotFoundComponent } from './page-not-found/page-not-found.component';
import { LandingPageComponent } from './landing-page/landing-page.component';
import { HeaderComponent } from './header/header.component';
import { CourseModule } from './courses/course.module';


const routes:Routes = [
  { path: 'welcome', component: LandingPageComponent, pathMatch: 'full' },
  { path: 'login/:id', canActivate: [AuthGuard],  children: [] },
  { path: '', canActivateChild: [AuthGuard], children: [
    { path: '', redirectTo: 'courses', pathMatch: 'full' },
    { path: 'courses',  loadChildren: () => CourseModule }
  ]},
  { path: '**', component: PageNotFoundComponent, pathMatch: 'full' }
]

@NgModule({
  imports: [RouterModule.forRoot(routes, { onSameUrlNavigation: 'reload', initialNavigation: 'enabled',
      paramsInheritanceStrategy: 'always' })],
  providers: [AuthGuard],
  exports: [RouterModule]
})


export class AppRoutingModule {  }

course-routing.module

import { NgModule } from '@angular/core';
import { RouterModule, Routes } from "@angular/router";
import { AuthGuard } from '../auth.guard';

import { CourseListComponent } from './course-list/course-list.component';
import { CourseDetailComponent } from './course-detail/course-detail.component';
import { CoursePlayComponent } from './course-play/course-play.component';
import { CourseQuizComponent } from './course-play/course-quiz/course-quiz.component';
import { CourseLessonComponent } from './course-play/course-lesson/course-lesson.component';


const routes:Routes = [
  { path: '', component: CourseListComponent, canActivate: [AuthGuard] },
  { path: ':courseId', component: CourseDetailComponent, canActivate: [AuthGuard] },
  { path: ':courseId/unit/:unitId', component: CoursePlayComponent, canActivate: [AuthGuard], canActivateChild: [AuthGuard], children: [
    { path: 'lesson/:lessonId', component: CourseLessonComponent, data:{ type: 'lesson'} },
    { path: 'quiz/:quizId', component: CourseQuizComponent, data: {type: 'quiz'}}
  ]}
]

@NgModule({
  imports: [RouterModule.forChild(routes)],
  exports: [RouterModule]
})
export class CourseRoutingModule { }

身份验证卫士

import { Injectable } from '@angular/core';
import { Observable, throwError } from 'rxjs';
import { Router, CanActivate, CanActivateChild, CanLoad, ActivatedRouteSnapshot, RouterStateSnapshot, NavigationExtras, Route } from '@angular/router';
import { AuthUserService } from './users/auth-user.service';
import { LocalStorage } from '@ngx-pwa/local-storage';

@Injectable()
export class AuthGuard implements CanActivate , CanActivateChild {

    constructor(private authUserService: AuthUserService, private router: Router) {   }

    canActivate(route: ActivatedRouteSnapshot, state:
       RouterStateSnapshot): boolean |
       Observable<boolean> | Promise<boolean> {
         let id, course_id;

         // save the id from route snapshot
         if (route.params) {
           id = +route.params.id;
           course_id = +route.params.courseId;
         }

         // if you try to logging with id
         if (id) {
           this.router.navigate(["/courses"]);
           return this.authUserService.login(id);
         }

         // if you're already logged in and navigate between pages
         if (this.authUserService.isLoggedIn()){
           if (course_id){
             // check if someone try to access a locked course
             if (this.authUserService.isCourseNotPartOfTheSubscription(course_id)){
               this.router.navigate(["/welcome"]);
               return false;
             }
             else
               return true;
           }
           else
             return true;
         }

         // if you are not logged and didn't try to log - redirect to landing page
         else {
           this.router.navigate(["/welcome"]);
           return false;
         }
        }

      canActivateChild(route: ActivatedRouteSnapshot,state: RouterStateSnapshot): boolean |
      Observable<boolean> | Promise<boolean> {
         return this.canActivate(route, state);
       }

       canLoad(route: ActivatedRouteSnapshot,state: RouterStateSnapshot): boolean |
       Observable<boolean> | Promise<boolean> {
         return this.canActivate(route, state);
       }
}

角度6：将紧急加载转换为延迟加载

4 个答案: