【Angular】共有componentを作る~importsとexportsの使い方~

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ng generate component shared/sharedButton

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<button>{{ title }}</button>

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import { Component, OnInit } from '@angular/core';

@Component({
  selector: 'app-shared-button',
  templateUrl: './shared-button.component.html',
  styleUrls: ['./shared-button.component.css'],
})
export class SharedButtonComponent implements OnInit {
  constructor() {}

  ngOnInit(): void {}

  title: string = '共有ボタン';
}

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ng generate module shared

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-app
  |-shared
      |-shared-button
      |     |-shared-button.component.css
      |     |-shared-button.component.html
      |     |-shared-button.component.spec.ts
      |     |_shared-button.component.ts
      |
      |_shared.module.ts

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import { NgModule } from '@angular/core';
import { CommonModule } from '@angular/common';
import { SharedButtonComponent } from './shared-button/shared-button.component';

@NgModule({
  declarations: [SharedButtonComponent],
  imports: [CommonModule],
  exports: [SharedButtonComponent],
})
export class SharedModule {}

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

import { AppRoutingModule } from './app-routing.module';
import { AppComponent } from './app.component';
import { SharedModule } from './shared/shared.module';
import { HelloComponent } from './hello/hello.component';

@NgModule({
  declarations: [AppComponent, HelloComponent],
  imports: [BrowserModule, AppRoutingModule, SharedModule],
  providers: [],
  bootstrap: [AppComponent],
})
export class AppModule {}

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-app
  |-sample-A
  |   |-sample-a
  |    |     |-sample-a.component.css
  |    |     |-sample-a.component.html
  |    |     |-sample-a.component.spec.ts
  |    |     |_sample-a.component.ts
  |    |
  |    |_sample-a.module.ts
  |-sample-B
  |    |-sample-b
  |    |     |-sample-b.component.css
  |    |     |-sample-b.component.html
  |    |     |-sample-b.component.spec.ts
  |    |     |_sample-b.component.ts
  |    |
  |    |_sample-b.module.ts

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ng generate component sample-A/sample-a
ng generate component sample-B/sample-b

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<p>sample-aコンポーネント</p>

<h3>共有コンポーネント↓</h3>
<app-shared-button></app-shared-button>

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ng generate module sample-A
ng generate module sample-B

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import { NgModule } from '@angular/core';
import { CommonModule } from '@angular/common';
import { SampleAComponent } from './sample-a/sample-a.component';
import { SharedModule } from '../shared/shared.module';

@NgModule({
  declarations: [SampleAComponent],
  imports: [CommonModule, SharedModule],
  exports: [SampleAComponent],
})
export class SampleAModule {}

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import { NgModule } from '@angular/core';
import { CommonModule } from '@angular/common';
import { SampleBComponent } from './sample-b/sample-b.component';
import { SharedModule } from '../shared/shared.module';

@NgModule({
  declarations: [SampleBComponent],
  imports: [CommonModule, SharedModule],
  exports: [SampleBComponent],
})
export class SampleBModule {}

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

import { AppRoutingModule } from './app-routing.module';
import { AppComponent } from './app.component';
import { SharedModule } from './shared/shared.module';
import { HelloComponent } from './hello/hello.component';
import { SampleAModule } from './sample-A/sample-a.module';
import { SampleBModule } from './sample-B/sample-b.module';

@NgModule({
  declarations: [AppComponent, HelloComponent],
  imports: [
    BrowserModule,
    AppRoutingModule,
    SharedModule,
    SampleAModule,
    SampleBModule,
  ],
  providers: [],
  bootstrap: [AppComponent],
})
export class AppModule {}

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<h1>Angular</h1>
<div>
  <a routerLink="SampleAComponent">SampleA</a>
</div>
<div>
  <a routerLink="SampleBComponent">SampleB</a>
</div>

<router-outlet></router-outlet>

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import { NgModule } from '@angular/core';
import { RouterModule, Routes } from '@angular/router';
import { SampleAComponent } from './sample-A/sample-a/sample-a.component';
import { SampleBComponent } from './sample-B/sample-b/sample-b.component';

const routes: Routes = [
  {
    path: 'SampleAComponent',
    component: SampleAComponent,
    // canDeactivate: [NavigationGuard],
  },
  {
    path: 'SampleBComponent',
    component: SampleBComponent,
    // canDeactivate: [NavigationGuard],
  },
];

@NgModule({
  imports: [RouterModule.forRoot(routes)],
  exports: [RouterModule],
})
export class AppRoutingModule {}