The benefits of exporting a component from one module and using it in another module

After putting in long hours trying to figure this out on my own, I've finally decided to seek help from the community. Thank you in advance for any assistance!

I have a Web Projects Module that utilizes a Webpage Component. Within the Webprojects Module, I am importing the Objects Module (which includes a Navbar Component and ComponentLoaderDirective).

Now, my challenge lies in loading the contents of navbar.html into webpage.component.html.

I'm encountering errors in Angular that prompt me to re-import NavbarComponent and ComponentLoaderDirective in weboage.components.ts. Without these imports, I receive the following errors: Cannot find the name 'Navbar Component'. Cannot find the name 'ComponentLoaderDirective'.

It seems like there's something missing here, but I'm struggling to identify what it could be.

webprojects.module.ts

import { NgModule } from '@angular/core';
import { HttpClientModule } from '@angular/common/http';
import { Global } from '../../../class.global'; //Global Class Contains the Global Variables & Functions Being Used Throughout the Project.
import { StartupService } from 'src/app/services/shared/startup.service'; //StartupService is Used to Get the Project, Page, Object & Elements on Page Load.
import { ObjectsModule } from './objects/objects.module';
import { WebpageComponent } from './webpage/webpage.component'; //WebProjectsModule Uses WebpageComponent as the View (webpage.component.html) & Controller (webpage.component.html).

@NgModule({
  declarations: [WebpageComponent], //WebProject Module Uses the Webpage Component
  imports: [HttpClientModule, ObjectsModule],
  exports: [], //Webprojects Module Exports the Webpage Component to the App Module & Other Modules Using the WebProjects Module
  providers: [StartupService, Global] //StartupService, GlobalClass are Required for the WebProjects Module to Work.  
})
export class WebProjectsModule {}

webpage.component.ts

//Near identical code as provided above with no alterations.

webpage.component.html

<ng-template pageObjectLoader></ng-template>
<div>Webpage Works!</div>

objects.module.ts

//More or less unchanged content, not altered in any way.

navbar.component.ts

//Exact same code as previously given, no differences made.

navbar.component.html

<mat-toolbar [ngClass]="class">
    <span>Yellow Pages & Classifieds | ypandc.com</span>
</mat-toolbar>

Answer №1

Discover the ngmodule-vs-jsmodule article that delves into the distinction between jsModules and ngModules. They may both help with code modularization, but they serve different purposes:

While JavaScript modules and NgModules can aid in organizing your code, it's important to note that they are fundamentally dissimilar. The functionality of Angular applications depends on the integration of these two module types.

  1. The 'import' property within an NgModule allows for the inclusion of other modules containing classes required by component templates defined within said NgModule.

  2. A jsModule must be properly declared using syntax in order to utilize a js module in another .ts file.

The export/import properties within ngModules are essential for specifying which classes are available for import in other modules, while the 'import' statement in your component.ts serves as TypeScript syntax for accessing objects within your file.

Answer №2

Don't stress, it's actually quite straightforward. You just need to implement a SCAM (Single Component Angular Module). Here's an example to guide you:

Start by creating your module and only exporting one component - this step is crucial

@NgModule({
  declarations: [ModuleAComponent],
  exports: [ModuleAComponent],
  imports: [
    ButtonModule // etc
  ],
})
export class ModuleA {}

Next, import ModuleA into ModuleB - as you can see, it's simple

@NgModule({
  declarations: [ModuleBComponent],
  exports: [ModuleBComponent],
  imports: [
    ModuleB
  ],
})
export class ModuleB {}

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