Leveraging Component without the need for Import

Is it possible to use a component without re-importing it if it's already declared in AppModule? With 10 or more pages/components to manage, importing each one can be challenging.

Here is my app.module.ts

import { NgModule, ErrorHandler } from '@angular/core';
import { IonicApp, IonicModule, IonicErrorHandler } from 'ionic-angular';
import { MyApp } from './app.component';

@NgModule({
declarations: [
    MyApp,
    HomePage
],
imports: [
    IonicModule.forRoot(MyApp)
],
bootstrap: [IonicApp],
entryComponents: [
    MyApp,
    HomePage
],
providers: [
    {provide: ErrorHandler, useClass: IonicErrorHandler}
]
})
export class AppModule {}

I want to use HomePage without importing it again, considering the number of pages I need to handle.

other-page.ts

import { Component } from '@angular/core';
@Component({
  selector: 'page-home',
  templateUrl: 'login.html',
  providers: [LoginService]
})
export class LoginPage {
constructor(){ }
//Call HomePage here without having to import it again.
}

Answer №1

In programming, if you reference a class within your code, it must be imported in order for it to be recognized as that specific class. Failing to import the necessary classes can result in invalid code or unexpected behavior.

It's important to note that the imports found at the top of a file are related to TypeScript, not Angular. On the other hand, the imports listed within @NgModule() pertain to Angular and serve a different purpose than TypeScript imports.

Therefore, including components in @NgModule() does not render other imports useless.

Answer №2

In order to utilize the Component within your TypeScript file, you must import it so that TypeScript can properly acknowledge it.
If you solely intend to use it within the Template, it only needs to be acknowledged by the Angular framework and does not require an import.

To inform Angular about your Component, you must declare it in a NgModule. Any Components within this NgModule will then recognize your Component.
To make your Component known to other NgModules, you must export it from the declaring NgModule and import that NgModule into the other NgModules.

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