CODEWITHSUNDEEP
angularionic-framework
etalon11
etalon11

Reputation: 984

How to access angular-component in ionic-page?

I have set up an ionic project and added a page "sumbuilder". After that, I added a component "partscount". The component was automatically added to the app.module.ts, but I didn't get managed to make the tag "<app-partscount></app-partscount>" running in my page. So I removed the component-declaration from app.module.ts, moved it to my sumbuilder.module.ts and then it worked.

Here is the working code:

import { NgModule } from '@angular/core';
import { CommonModule } from '@angular/common';
import { FormsModule } from '@angular/forms';
import { Routes, RouterModule } from '@angular/router';

import { IonicModule } from '@ionic/angular';

import { SumbuilderPage } from './sumbuilder.page';
import { PartcountsComponent} from '../partcounts/partcounts.component';

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

@NgModule({
  imports: [
    CommonModule,
    FormsModule,
    IonicModule,
    RouterModule.forChild(routes)
  ],
  declarations: [
    SumbuilderPage, 
    PartcountsComponent
  ]
})
export class SumbuilderPageModule {}

Now the question: What do I have to add in this file (sumbuilder.module.ts) to access the Component, when it is declared in app.module.ts? I'm new to angular and sure, it is a beginner-question. Because I want to use this component more than once, I want to declare it in app.module.

app.module.ts:

import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { RouteReuseStrategy } from '@angular/router';

import { IonicModule, IonicRouteStrategy } from '@ionic/angular';
import { SplashScreen } from '@ionic-native/splash-screen/ngx';
import { StatusBar } from '@ionic-native/status-bar/ngx';

import { AppComponent } from './app.component';
import { AppRoutingModule } from './app-routing.module';
import { PartcountsComponent } from './partcounts/partcounts.component';
import { FormsModule } from '@angular/forms';

@NgModule({
  declarations: [AppComponent, PartcountsComponent],
  entryComponents: [],
  imports: [
    BrowserModule,
    IonicModule.forRoot(),
    AppRoutingModule,
    FormsModule,
  ],
  exports: [
    PartcountsComponent
  ],
  providers: [
    StatusBar,
    SplashScreen,
    { provide: RouteReuseStrategy, useClass: IonicRouteStrategy }
  ],
  bootstrap: [AppComponent]
})
export class AppModule {}

Upvotes: 0

Views: 448

Answers (1)

Fartab
Fartab

Reputation: 5503

If I understand your question correctly, you mean that how we can declare a component in a module and use it in another module. If you mean so, here is the answer:

Each angular module must specify it's declared components using declaration: [] of @NgModule decorator. If that module let other modules to use its components, then it must be specified in exports: [] of @NgModule. In such situation, another module can import the module and use its exported components. Here is an example:

@Component({
  selector: 'first-component',
  template: `<p> I'm first component </p>`
})
export class FirstComponent {}

@NgModule({
  declarations: [ FirstComponent ],
  exports: [ FirstComponent ]
})
export class MyFirstModule {}

In another module we can use exported FirstComponent of MyFirstModule :

@NgModule({
  declarations: [ ComponentWhichUsesFirstComponent ],
  imports: [ MyFirstModule ]
})
export class MySecondModule {}

@Component({
  selector: 'an-optional-selector',
  template: `<first-component>  </first-component>`
})
export class ComponentWhichUsesFirstComponent {}

See this stackblits example.

Upvotes: 1

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