I successfully used component in routing but when i am using module instead of component in angular 10 i am getting a white screen.
I would be really thankful for any kind of help.
this is what i've been trying:
app-routing.module.ts
import { NgModule } from '#angular/core';
import { Routes, RouterModule } from '#angular/router';
import { DashboardModule } from './components/dashboard/dashboard.module';
import { DashboardComponent } from './components/dashboard/dashboard.component';
const routes: Routes = [
{ path: '', loadChildren: () => DashboardModule }
];
#NgModule({
imports: [RouterModule.forRoot(routes)],
exports: [RouterModule]
})
export class AppRoutingModule { }
Dashboard module:
import { NgModule } from '#angular/core';
import { CommonModule } from '#angular/common';
import { DashboardComponent } from './dashboard.component';
#NgModule({
declarations: [
DashboardComponent
],
imports: [
CommonModule
]
})
export class DashboardModule { }
Dashboard Component:
import { Component, OnInit } from '#angular/core';
#Component({
selector: 'app-dashboard',
templateUrl: './dashboard.component.html',
styleUrls: ['./dashboard.component.css']
})
export class DashboardComponent implements OnInit {
constructor() {
alert('asdf');
}
ngOnInit(): void {
}
}
Thanks
Lazy loaded feature modules have to have their child routes declared separately. For example:
import { NgModule } from '#angular/core';
import { Routes, RouterModule } from '#angular/router';
import { DashboardComponent } from './dashboard.component';
const routes: Routes = [
{
path: '',
component: DashboardComponent,
},
];
#NgModule({
imports: [RouterModule.forChild(routes)],
exports: [RouterModule]
})
export class DashboardRoutingModule { }
Also make sure to always load lazy modules like Emilien said before :)
loadChildren: () => import('./components/dashboard/dashboard.module').then(m => m.DashboardModule)
Related
First is the path in my app routing module
Then the home component
Next is the app component
Lastly the html for button creation
path in the app.routing.module.ts
{
path: 'about-us',
pathMatch: 'full',
data: { type: '', breadcrumb: '' },
component: AboutUsComponent,
},
default constructor and ngOnInit in home.component.ts only router variable in constructor
import { Component, OnInit } from '#angular/core';
import {Router} from '#angular/router';
#Component({
selector: 'app-home',
templateUrl: './home.component.html',
styleUrls: ['./home.component.scss'],
})
export class HomeComponent implements OnInit {
constructor(private router : Router) {}
ngOnInit(): void {}
}
default imports in app.module.ts only
import { NgModule } from '#angular/core';
import { BrowserModule } from '#angular/platform-browser';
import { AppRoutingModule } from './app-routing.module';
import { AppComponent } from './app.component';
import { HomeComponent } from './home/home.component';
import { AboutUsComponent } from './about-us/about-us.component';
import { LoginComponent } from './login/login.component';
import { LogoutComponent } from './logout/logout.component';
import { SocialMediaComponent } from './social-media/social-media.component';
import { LoggedInHomeComponent } from './logged-in-home/logged-in-home.component';
import { PageNotFoundComponent } from './page-not-found/page-not-found.component';
#NgModule({
declarations: [
AppComponent,
HomeComponent,
AboutUsComponent,
LoginComponent,
LogoutComponent,
SocialMediaComponent,
LoggedInHomeComponent,
PageNotFoundComponent
],
imports: [
BrowserModule,
AppRoutingModule
],
providers: [],
bootstrap: [AppComponent]
})
export class AppModule { }
**button creation code home.component.html**
<div class="about-us">
<button class="button-box" type="button">
<a [routerLink]="'about-us'" [routerLinkActive]="['active']">about-us</a>
</button>
</div>
*My objectives are:
i. Redirect to about us component on click
ii. Open about us component when path is mentioned in url
But neither is working!*
You are missing to import RouterModule from import { RouterModule } from '#angular/router';
Hope you have include RoutingModule in AppRoutingModule. If so try the following code
<a [routerLink]="['about-us']" [routerLinkActive]="['active']">about-us</a>
Have you added router-outlet in
app.component.html file.
Add only above tag & remove everything else from app.component.html if added
Try this & let me know
This question already has answers here:
'router-outlet' is not a known element
(24 answers)
Closed 8 months ago.
I have tried to include all imports to the necessary files,But I have got the following error while compiling. How could I solve it?
I have generated four differnet commonents Menu,home,contact,and about.Additional to this thare are also Header component that will later help to contain the memu bar to switch between the differnt components.And also footer component.The app-routing.ts and routes.ts files are also attached with this file,which helps for routing purpose.
'router-outlet' is not a known element:
1. If 'router-outlet' is an Angular component, then verify that it is part of this module.
2. If 'router-outlet' is a Web Component then add 'CUSTOM_ELEMENTS_SCHEMA' to the
'#NgModule.schemas' of this component to suppress this message. ("<app-header></app-header>
[ERROR ->]<router-outlet></router-outlet>
<app-footer></app-footer>"): ng:///AppModule/AppComponent.html#1:0
at syntaxError (compiler.js:1021)
at TemplateParser.push../node_modules/#angular/compiler/fesm5 /compiler.js.TemplateParser.parse (compiler.js:14830)
at JitCompiler.push../node_modules/#angular/compiler/fesm5/compiler.js.JitCompiler._parseTemplate (compiler.js:24018)
at JitCompiler.push../node_modules/#angular/compiler/fesm5/compiler.js.JitCompiler._compileTemplate (compiler.js:24005)
at compiler.js:23948
at Set.forEach (<anonymous>)
at JitCompiler.push../node_modules/#angular/compiler/fesm5/compiler.js.JitCompiler._compileComponents (compiler.js:23948)
at compiler.js:23858
at Object.then (compiler.js:1012)
at JitCompiler.push../node_modules/#angular/compiler/fesm5/compiler.js.JitCompiler._compileModuleAndComponents (compiler.js:23857)
routes.ts file
import { Routes } from '#angular/router';
import { MenuComponent } from '../menu/menu.component';
import { DishdetailComponent } from '../dishdetail/dishdetail.component';
import { HomeComponent } from '../home/home.component';
import { AboutComponent } from '../about/about.component';
import { ContactComponent } from '../contact/contact.component';
export const routes: Routes = [
{ path: 'home', component: HomeComponent },
{ path: 'menu', component: MenuComponent },
{ path: '', redirectTo: '/home', pathMatch: 'full' }
];
app-routing.module.ts file
import { NgModule } from '#angular/core';
import { CommonModule } from '#angular/common';
import { RouterModule, Routes } from '#angular/router';
import { routes } from './routes';
#NgModule({
imports: [
CommonModule,
RouterModule.forRoot(routes)
],
exports: [ RouterModule ],
declarations: []
})
export class AppRoutingModule { }
app.module.ts file
import { BrowserModule } from '#angular/platform-browser';
import { NgModule } from '#angular/core';
import { BrowserAnimationsModule } from '#angular/platform-browser/animations';
import { MatToolbarModule } from '#angular/material/toolbar';
import {MatListModule} from '#angular/material/list';
import {MatGridListModule} from '#angular/material/grid-list';
import {MatCardModule} from "#angular/material/card";
import {MatButtonModule} from "#angular/material/Button";
import { FlexLayoutModule } from '#angular/flex-layout';
import 'hammerjs';
import { AppComponent } from './app.component';
import { MenuComponent } from './menu/menu.component';
import { FooterComponent} from './footer/footer.component';
import { HeaderComponent} from './header/header.component';
import { DishdetailComponent } from './dishdetail/dishdetail.component';
import { HomeComponent } from './home/home.component'
import { AboutComponent } from './about/about.component';
import { ContactComponent } from './contact/contact.component';
import {DishService} from './services/dish.service';
import {RouterModule} from '#angular/router';
import { AppRoutingModule } from './app-routing/app-routing.module';
#NgModule({
declarations: [
AppComponent,
MenuComponent,
DishdetailComponent,
HeaderComponent,
FooterComponent,
HomeComponent,
AboutComponent,
ContactComponent
],
imports: [
BrowserModule,
BrowserAnimationsModule,
FlexLayoutModule,
MatToolbarModule,
MatGridListModule,
MatCardModule,
MatButtonModule,
MatListModule,
AppRoutingModule,
RouterModule
],`
`providers: [
DishService
],`
`bootstrap: [AppComponent]`
`})`
export class AppModule { }
app.component.html file
<app-header></app-header>
<router-outlet></router-outlet>
<app-footer></app-footer>
I see you are missing app-routing.module.ts inside the imports of AppModule
#NgModule({
imports: [
CommonModule,
routingModule
],
})
export class AppModule{ }
I noticed that in your app.module.ts file you have back ticks ``` in inappropriate places somewhere around providers & bootstrap array. I copied & pasted this from your own code so you can see it better:
...MatListModule,
AppRoutingModule,
RouterModule
],`
`providers: [
DishService
],`
`bootstrap: [AppComponent]`
`})`
export class AppModule { }
Do this:
Remove all the back ticks in the app.module.ts file like I have done below and restart your terminal. This should solve any problems you are having.
...MatListModule,
AppRoutingModule,
RouterModule
],
providers: [
DishService
],
bootstrap: [AppComponent]
})
export class AppModule { }
I copied and pasted your code and worked on the files you provided information about. With the back ticks removed, your code works fine here on my laptop. Here's the result in the gif below, route works properly & no errors in the console. Example with just home & menu components.
Final result:
I removed all other things that didn't relate to routing from your code so that it would be easier to detect errors. Here's my folder structure.
Folder structure:
And here are the contents of my files:
route.ts file:
import { Routes } from '#angular/router';
import { MenuComponent } from './menu/menu.component';
import { HomeComponent } from './menu/home.component';
export const routes: Routes = [
{ path: 'home', component: HomeComponent },
{ path: 'menu', component: MenuComponent },
{ path: '', redirectTo: '/home', pathMatch: 'full' }
];
app.module.ts file:
import { BrowserModule } from '#angular/platform-browser';
import { NgModule } from '#angular/core';
import { AppComponent } from './app.component';
import { MenuComponent } from './menu/menu.component';
import { HomeComponent } from './menu/home.component';
import { AppRoutingModule } from './app-routing.module';
import { RouterModule } from '#angular/router';
#NgModule({
declarations: [
AppComponent,
HomeComponent,
MenuComponent
],
imports: [
BrowserModule,
AppRoutingModule,
RouterModule
],
providers: [
],
bootstrap: [AppComponent]
})
export class AppModule { }
app.component.ts file:
import { Component } from '#angular/core';
#Component({
selector: 'app-root',
template: `
<router-outlet></router-outlet>
`
})
export class AppComponent {
}
app-routing.module.ts:
import { NgModule } from '#angular/core';
import { CommonModule } from '#angular/common';
import { RouterModule, Routes } from '#angular/router';
import { routes } from './routes';
#NgModule({
imports: [
CommonModule,
RouterModule.forRoot(routes)
],
exports: [ RouterModule ],
declarations: []
})
export class AppRoutingModule { }
menu.component.ts:
import { Component } from '#angular/core';
#Component({
template: '<h1>Menu Component</h1>'
})
export class MenuComponent {
}
home.component.ts:
import { Component } from '#angular/core';
#Component({
template: '<h1>Home Component</h1>'
})
export class HomeComponent {
}
Like I said, once I removed those unnecessary back ticks from the app.module.ts, your code worked fined with no errors.
I have started everything from scratch.Then my issue was fixed.I don't exactly know where is my problem.But,probably I have made routes file in separate folder.Making routes file in app-routing folder, fixed my issue.
I'm beginner in Angular 9. I'm following an online video tutorial to excercise on angular, but my code (same of the tutorial) had a problem and I don't know of to figure out.
Actually, tutorial put routing stuffs all inside app.module.ts, but I use app-routing.module.ts to separate concerns.
When I launch 'ng serve --open', page still blank with the following error:
core.js:6185 ERROR NullInjectorError: R3InjectorError(AppModule)[ActivatedRoute -> ActivatedRoute -> ActivatedRoute]:
NullInjectorError: No provider for ActivatedRoute!
at NullInjector.get (http://localhost:4200/vendor.js:16926:27)
at R3Injector.get (http://localhost:4200/vendor.js:30642:33)
at R3Injector.get (http://localhost:4200/vendor.js:30642:33)
at R3Injector.get (http://localhost:4200/vendor.js:30642:33)
at NgModuleRef$1.get (http://localhost:4200/vendor.js:47971:33)
at Object.get (http://localhost:4200/vendor.js:45804:35)
at getOrCreateInjectable (http://localhost:4200/vendor.js:20704:39)
at Module.ɵɵdirectiveInject (http://localhost:4200/vendor.js:34541:12)
at NodeInjectorFactory.BookComponent_Factory [as factory] (http://localhost:4200/main.js:733:153)
at getNodeInjectable (http://localhost:4200/vendor.js:20849:44)
Actually I had this problem since I use providers. Is it hard to understand, because of console doesn't give any class line code. However I'm trying to describe here useful classes that should use it by following, if more classes needs, I will do that:
--app.module.ts--
import { BrowserModule } from '#angular/platform-browser';
import { NgModule } from '#angular/core';
import { AppRoutingModule } from './app-routing.module';
import { AppComponent } from './app.component';
import { BookComponent } from './components/book/book.component';
import { FormsModule, ReactiveFormsModule } from '#angular/forms';
import { BooklistComponent } from './components/booklist/booklist.component';
import { BookEditComponent } from './components/book-edit/book-edit.component';
import { TreeComponent } from './components/tree/tree.component';
import { NgInitDirective } from './directive/ng-init/ng-init.directive';
// for angular firebase #https://github.com/angular/angularfire/blob/master/docs/install-and-setup.md
import { AngularFireModule } from '#angular/fire';
import { AngularFirestore } from '#angular/fire/firestore';
import { environment } from '../environments/environment';
// import our service (that uses firebase)
import { CartService } from './services/cart/cart.service'
import { HttpModule } from '#angular/http';
#NgModule({
declarations: [
AppComponent,
BookComponent,
BooklistComponent,
BookEditComponent,
TreeComponent,
NgInitDirective
],
imports: [
BrowserModule,
AppRoutingModule,
FormsModule,
ReactiveFormsModule,
AngularFireModule.initializeApp(environment.firebase), // have a look in firebase.ts
AngularFireModule,
HttpModule
],
providers: [],
bootstrap: [AppComponent]
})
export class AppModule { }
--app-routing.module.ts--
import { NgModule } from '#angular/core';
import { Routes, RouterModule } from '#angular/router';
import { BookComponent } from './components/book/book.component';
import { BookEditComponent } from './components/book-edit/book-edit.component';
import { BooklistComponent } from './components/booklist/booklist.component';
const routes: Routes = [
{ path: 'books/:title', component: BookComponent},
{ path: 'books/:title/edit', component: BookEditComponent},
{ path: 'books', component: BooklistComponent},
{
path: '',
redirectTo: 'books/',
pathMatch: 'full'
}
];
#NgModule({
imports: [RouterModule.forRoot(routes)],
exports: [RouterModule]
})
export class AppRoutingModule { }
--book.component.ts--
import { Component, OnInit, Input, Output, EventEmitter } from '#angular/core';
import { BookModel } from '../../models/book/book.model';
import { CurrencyPipe } from '#angular/common';
import { ActivatedRoute } from '#Angular/router'
import { CartService } from '../../services/cart/cart.service';
#Component({
selector: 'book',
templateUrl: './book.component.html',
styleUrls: ['./book.component.css']
})
export class BookComponent implements OnInit {
#Input() book: BookModel;
#Output() addToCart: EventEmitter<BookModel> = new EventEmitter();
constructor(private route: ActivatedRoute, private cs: CartService) {
route.params.subscribe(res => {
this.book = BookModel.find(res['title']);
});
}
ngOnInit(): void {
}
sendToCart() {
this.addToCart.emit(this.book);
// the following method is added in cart.service.ts
this.cs.add(this.book);
}
// methods
votesCounter() {
return this.book.upvotes;
}
upvote() {
return this.book.upvotes++;
}
}
As I use app-routing.module.ts, there is a quite difference in app.module of tutorial (that puts also routing stuffs inside it):
import { BrowserModule } from '#angular/platform-browser';
import { NgModule } from '#angular/core';
import { FormsModule, ReactiveFormsModule } from '#angular/forms';
import { RouterModule, Routes } from '#angular/router';
import { AngularFireModule } from 'angularfire2';
import { AngularFirestore } from 'angularfire2/firestore';
import { environment } from '../environments/environment';
import { AppComponent } from './app.component';
import { BookComponent } from './components/book/book.component';
import { BookListComponent } from './components/book-list/book-list.component';
import { BookEditComponent } from './components/book-edit/book-edit.component';
import { TreeComponent } from './components/tree/tree.component';
import { NgInitDirective } from './directive/ng-init/ng-init.directive';
import { CartService } from './services/cart/cart.service';
const bookRoutes: Routes = [
{ path: 'books/:title', component: BookComponent },
{ path: 'books/:title/edit', component: BookEditComponent },
{ path: 'books', component: BookListComponent },
{
path: '',
redirectTo: 'books/',
pathMatch: 'full'
}
]
#NgModule({
declarations: [
AppComponent,
BookComponent,
BookListComponent,
BookEditComponent,
TreeComponent,
NgInitDirective
],
imports: [
RouterModule.forRoot(bookRoutes),
BrowserModule,
FormsModule,
ReactiveFormsModule,
AngularFireModule.initializeApp(environment.firebase),
AngularFireModule
],
providers: [],
bootstrap: [AppComponent]
})
export class AppModule { }
I tryed with solutions given from similar questions, but it doesn't work.
You have a typing error,
change #Angular/router with #angular/router in book.component.ts
I have a Simple Angular 2 App with a Module(InformationPagesModule module) that contains two lazy load components (Info1 Component and Info2 Component). I want to load that components when entering the following routes in the browser:
http://localhost:4200/info1 - Loads the Info1Component
http://localhost:4200/info2 - Loads the Info2Component
here the interest classes:
app.component.html
<router-outlet></router-outlet>
app.module.ts
import { BrowserModule } from '#angular/platform-browser';
import { NgModule } from '#angular/core';
import { AppRoutingModule } from './app-routing.module';
import { AppComponent } from './app.component';
import { HomeComponent } from './home/home.component';
import { InformationPagesModule } from './information-pages/information-pages.module';
#NgModule({
declarations: [
AppComponent,
HomeComponent
],
imports: [
BrowserModule,
AppRoutingModule,
SharedModule,
InformationPagesModule
],
providers: [],
bootstrap: [AppComponent]
})
export class AppModule { }
app-routing.module.ts
import { NgModule } from '#angular/core';
import { Routes, RouterModule, Router } from '#angular/router';
import { HomeComponent } from './home/home.component';
const routes: Routes = [
{path:'', component: HomeComponent},
{path:'info1', loadChildren: './information-pages/information-pages.module#InformationPagesModule'},
{pathMatch:'full', path:'info2', loadChildren: './information-pages/information-pages.module#InformationPagesModule'},
{ path: '**', redirectTo: '' }
];
#NgModule({
imports: [RouterModule.forRoot(routes)],
exports: [RouterModule],
})
export class AppRoutingModule { }
information-pages.module.ts
import { NgModule } from '#angular/core';
import { CommonModule } from '#angular/common';
import { InformationPagesRoutingModule } from './information-pages-routing.module';
import { Info1Component } from './info1/info1.component';
import { Info2Component } from './info2/info2.component';
#NgModule({
imports: [
CommonModule,
InformationPagesRoutingModule
],
declarations: [Info1Component, Info2Component]
})
export class InformationPagesModule { }
information-pages-routing.module.ts
import { NgModule } from '#angular/core';
import { Routes, RouterModule } from '#angular/router';
import { Info1Component } from './info1/info1.component';
import { Info2Component } from './info2/info2.component';
const routes: Routes = [
{path:'info1', component: Info1Component},
{path:'info2', component: Info2Component}
];
#NgModule({
imports: [RouterModule.forChild(routes)],
exports: [RouterModule]
})
export class InformationPagesRoutingModule { }
My question is, why when entering some of the routes / info1 or / info2, a blank page is displayed?
How should I configure the routes in my application so that it works?
Many Thanks!
In your app-routing.module.ts you want to declare one parent route to all routes of one lazy loaded module. That means you might want to map all routes starting with /info to your information-pages-routing.module.ts. The routes to your components (info1 and info2) you'll declare inside the lazy loaded module.
app-routing.module.ts
import { NgModule } from '#angular/core';
import { Routes, RouterModule, Router } from '#angular/router';
import { HomeComponent } from './home/home.component';
const routes: Routes = [
{ path:'', component: HomeComponent },
{ path: 'info', loadChildren: './information-pages/information-pages.module#InformationPagesModule' },
{ path: '**', redirectTo: '' }
];
#NgModule({
imports: [RouterModule.forRoot(routes)],
exports: [RouterModule],
})
export class AppRoutingModule { }
The file information-pages-routing.module.ts stays the same
import { NgModule } from '#angular/core';
import { Routes, RouterModule } from '#angular/router';
import { Info1Component } from './info1/info1.component';
import { Info2Component } from './info2/info2.component';
const routes: Routes = [
{path:'info1', component: Info1Component},
{path:'info2', component: Info2Component}
];
#NgModule({
imports: [RouterModule.forChild(routes)],
exports: [RouterModule]
})
export class InformationPagesRoutingModule { }
You'll now be able to access the Info1Component by the route /info/info1 and the Info2Component by the route /info/info2. If you wish to access your compoents by the routes /info1 and /info2 you can either create two lazy loaded modules or just redirect /info1 to /info/info1
You might also consider loading child modules like this:
{ path: 'info', loadChildren: () => import('./information-pages/information-pages.module').then(m => m.InformationPageModule) }
Rather than
{ path: 'info', loadChildren: './information-pages/information-pages.module#InformationPagesModule' }
For more information please refer to the official documentation https://angular.io/guide/lazy-loading-ngmodules
Use this way instead of using module level routing, use AppRoutingModule for routing your components.
import { NgModule } from '#angular/core';
import { Routes, RouterModule, Router } from '#angular/router';
import { HomeComponent } from './home/home.component';
import { Info1Component } from './info1/info1.component';
import { Info2Component } from './info2/info2.component';
const routes: Routes = [
{path:'', component: HomeComponent},
{path:'info1', component: Info1Component},
{path:'info2', component: Info2Component},
{ path: '**', redirectTo: '' }
];
#NgModule({
imports: [RouterModule.forRoot(routes)],
exports: [RouterModule],
})
export class AppRoutingModule { }
If you use this information-pages-routing.module.ts is not required any more.
I have created a simple application in Angular8, and using some routing link and components.
on click on left Navigation I want call that component in my middle of the body as per attached screen shot.
My workings for:
**app-routing.module.ts**
import { NgModule } from '#angular/core';
import { Routes, RouterModule } from '#angular/router';
import { ButtonComponent } from './button/button.component';
import { CardsComponent } from './cards/cards.component';
import { PageNotFoundComponent } from './page-not-found/page-not-found.component';
const routes: Routes = [
{path: 'button', component: ButtonComponent},
{path: 'cards', component: CardsComponent},
{path: '', redirectTo: '/button', pathMatch:'full'},
{path: '**', component:PageNotFoundComponent}
];
#NgModule({
imports: [RouterModule.forRoot(routes)],
exports: [RouterModule]
})
export class AppRoutingModule { }
I have written all my HTML code in app.compnent.html
**app.compnent.html**
import { BrowserModule } from '#angular/platform-browser';
import { NgModule } from '#angular/core';
import { AppRoutingModule } from './app-routing.module';
import { AppComponent } from './app.component';
import { ButtonComponent } from './button/button.component';
import { CardsComponent } from './cards/cards.component';
import { PageNotFoundComponent } from './page-not-found/page-not-found.component';
#NgModule({
declarations: [
AppComponent,
ButtonComponent,
CardsComponent,
PageNotFoundComponent
],
imports: [
BrowserModule,
AppRoutingModule
],
providers: [],
bootstrap: [AppComponent]
})
export class AppModule { }