typescript - RangeError: Maximal storlek på anropsstacken överskriden Lågprioriterad routing Angular 2
Jag försöker implementera lat ruttning i min app.
Jag har ett väldigt stort projekt och när det var på router-deprecated använde jag AsyncRoute, men nu har det tagits bort.
Så jag försökte implementera den senaste lazy loading, men jag fick ett problem RangeError: Maximum call stack size exceeded Vad gör jag fel? Jag gjorde all kod enligt instruktionerna.
Titta gärna
TräffarModul
import { NgModule } from '@angular/core';
// import { CommonModule } from '@angular/common';
/* --------------- !System modules --------------- */
import { SharedModule } from 'sharedModule'; //There is a lot of shared components/directives/pipes (over 60) and it re-exports CommonModule so I can't avoid it
/* --------------- !App outer modules --------------- */
import { EncountersComponent } from './encounters.component';
// import { PassCodeComponent } from '../../shared/components/passcode/passcode.component';
@NgModule({
imports: [ SharedModule ],
declarations: [ EncountersComponent],
exports: [ EncountersComponent ],
})
export class EncountersModule { }
Här är min app.routing.module
import { NgModule } from '@angular/core';
// import { ModuleWithProviders } from '@angular/core';
import { Routes, RouterModule } from '@angular/router';
import { ImagingComponent } from '../modules/index';
import { DashboardComponent } from '../modules/index';
import { PrescriptionNoticesComponent } from '../modules/index';
// import { EncountersComponent } from "../modules/encounters/encounters.component";
import { ScheduleComponent } from "../modules/schedule/schedule.component";
import { AdminComponent } from '../modules/index';
@NgModule({
imports: [
RouterModule.forRoot([
{
path: '',
component: DashboardComponent,
data: { label: 'Dashboard' }
},
{
path: 'encounters',
// component: EncountersComponent,
loadChildren: 'production/modules/encounters/encounters.module#EncountersModule',
data: { label: 'Encounters' }
},
{
path: 'admin',
component: AdminComponent,
data: { label: 'Admin' }
}
])
],
exports: [
RouterModule
]
})
export class AppRoutingModule {}
// const appRoutes: Routes = [
// {
// path: 'imaging',
// component: ImagingComponent,
// data: { label: 'Imaging' }
// },
// {
// path: '',
// component: DashboardComponent,
// data: { label: 'Dashboard' }
// },
// {
// path: 'prescription_notices',
// component: PrescriptionNoticesComponent,
// data: { label: 'Prescription Notices' }
// },
// {
// path: 'encounters',
// component: EncountersComponent,
// data: { label: 'Encounters' }
// },
// {
// path: 'schedule',
// component: ScheduleComponent,
// data: { label: 'Schedule' }
// },
// {
// path: 'admin',
// component: AdminComponent,
// data: { label: 'Admin' }
// }
// ];
//
// export const appRoutingProviders: any[] = [
//
// ];
//
// export const routing: ModuleWithProviders = RouterModule.forRoot(appRoutes);
Svar #1
loadChildren behöver referera till modul med routing
Genom att tilldela ett värde till loadChildren-egenskapen inuti en rutt, måste du referera till en modul som har ett routningssystem implementerat. Med andra ord, referera endast till en modul som importerar RoutingModule och konfigurerar den med metoden forChild(routes).
import { NgModule } from '@angular/core';
import { RouterModule, Routes } from '@angular/router';
// import { CommonModule } from '@angular/common';
/* --------------- !System modules --------------- */
import { SharedModule } from 'sharedModule'; //There is a lot of shared components/directives/pipes (over 60) and it re-exports CommonModule so I can't avoid it
/* --------------- !App outer modules --------------- */
import { EncountersComponent } from './encounters.component';
// import { PassCodeComponent } from '../../shared/components/passcode/passcode.component';
export const encountersModuleRoutes: Routes = [
/* configure routes here */
];
@NgModule({
imports: [ SharedModule, RouterModule.forChild(encountersModuleRoutes) ],
declarations: [ EncountersComponent],
exports: [ EncountersComponent ],
})
export class EncountersModule { }
Svar #2
Jag är inte säker eftersom det inte uttryckligen nämns i dokumentationen (2.4.2), men från exemplen i guiderna "Angular Modules" och "Routing & Navigation" har jag dragit följande mönster:
- Den lata modulen bör ha sin egen routningsmodul.
- Den routes-array som definieras i "lazy-routing.module" bör ha ett enda element;
path-egenskapen för det elementet bör vara en tom sträng;component-egenskapen bör vara definierad (nödvändig när den lata modulen tillhandahåller någon tjänst för att injektion ska fungera korrekt) och mallen för den refererade komponenten bör ha ett element med<router-outlet>-direktivet. Denna route har vanligtvis enchildren-egenskap. - Värdet på
path-egenskapen för den lata routen som definieras i "app-routing.module" ("lazyModulePrefix" i mitt exempel) skulle vara prefixet för alla vägar som definieras i ".lazy-routing.module".
Till exempel:
///////////// app-routing.module.ts /////////////////////
import { NgModule } from '@angular/core';
import { Routes, RouterModule } from '@angular/router';
import { LoginComponent } from './login/login.component';
import { PageNotFoundComponent } from './page-not-found.component';
const appRoutes: Routes = [
{ path: 'login', component: LoginComponent },
{ path: 'lazyModulePrefix', loadChildren: 'app/lazyModulePath/lazy.module#LazyModule' }, //
{ path: '', redirectTo: 'login', pathMatch: 'full'},
{ path: '**', component: PageNotFoundComponent },
];
@NgModule({
imports: [RouterModule.forRoot(appRoutes)],
exports: [RouterModule]
})
export class AppRoutingModule {}
.
///////////// lazy-routing.module.ts /////////////////////
import { NgModule } from '@angular/core';
import { Routes, RouterModule } from '@angular/router';
import { LazyModuleRootComponent } from './lazy-module-root.component';
import { LazyModuleHomeComponent } from './lazy-module-home.component';
import { AComponentDeclaredInTheLazyModule1 } from './a-component-declared-in-the-lazy-module-1.component';
import { AComponentDeclaredInTheLazyModule2 } from './a-component-declared-in-the-lazy-module-2.component';
const lazyModuleRoutes: Routes = [ // IMPORTANT: this array should contain a single route element with an empty path. And optionally, as many children as desired.
{ path: '',
component: LazyModuleRootComponent, // the `component` property is necessary when the lazy module provides some service in order to injection work well. If defined, the referenced component's template should have an element with the `<router-outlet>` directive.
children: [
{ path: '', component: LazyModuleHomeComponent }, // this component has no diference with the other children except for the shorter route.
{ path: 'somePath1', component: AComponentDeclaredInTheLazyModule1 },
{ path: 'somePath2', component: AComponentDeclaredInTheLazyModule2 },
] }
];
@NgModule({
imports: [RouterModule.forChild(lazyModuleRoutes)],
exports: [RouterModule]
})
export class LazyRoutingModule { }
.
//////////////////// lazy.module.ts ////////////////////
import { NgModule } from '@angular/core';
import { CommonModule } from '@angular/common';
import { SharedModule } from '../shared/shared.module';
import { LazyRoutingModule } from './lazy-routing.module';
import { LazyModuleRootComponent } from './lazy-module-root.component';
import { LazyModuleHomeComponent } from './lazy-module-home.component';
import { AComponentDeclaredInTheLazyModule1 } from './a-component-declared-in-the-lazy-module-1.component';
import { AComponentDeclaredInTheLazyModule2 } from './a-component-declared-in-the-lazy-module-2.component';
@NgModule({
imports: [
CommonModule,
SharedModule,
LazyRoutingModule,
],
declarations: [
LazyModuleRootComponent,
LazyModuleHomeComponent,
AComponentDeclaredInTheLazyModule1,
AComponentDeclaredInTheLazyModule2,
]
})
export class LazyModule { }
.
//////////////// lazy-module-root.component.ts //////////////////
import { Component } from '@angular/core';
@Component({
template: '<router-outlet></router-outlet>'
})
export class LazyModueRootComponent { }
Med koden ovan skulle ruttmappningen vara:
http://host/login -> LoginComponent
http://host/lazyModulePrefix -> LazyModuleHomeComponent
http://host/lazyModulePrefix/somePath1 -> AComponentDeclaredInTheLazyModule1
http://host/lazyModulePrefix/somePath2 -> AComponentDeclaredInTheLazyModule2
http://host/anythingElse -> PageNotFoundComponent
