Submodules and components

src/app/shared/shared.module.ts

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+import { NgModule } from '@angular/core';
+import { CommonModule } from '@angular/common';
+import { LayoutComponent } from './layout/layout.component';
+import { TitleComponent } from './title/title.component';
+import { RouterModule } from '@angular/router';
+
+@NgModule({
+  imports: [
+    CommonModule,
+    RouterModule,
+  ],
+  exports: [
+    LayoutComponent,
+    TitleComponent,
+  ],
+  declarations: [
+    LayoutComponent,
+    TitleComponent,
+  ],
+})
+export class SharedModule { }

src/app/shared/title/title.component.html

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+<div>
+  <h2>{{ message }}</h2>
+  <hr />
+</div>

src/app/shared/title/title.component.spec.ts

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+import { async, ComponentFixture, TestBed } from '@angular/core/testing';
+
+import { TitleComponent } from './title.component';
+
+describe('TitleComponent', () => {
+  let component: TitleComponent;
+  let fixture: ComponentFixture<TitleComponent>;
+
+  beforeEach(async(() => {
+    TestBed.configureTestingModule({
+      declarations: [ TitleComponent ]
+    })
+    .compileComponents();
+  }));
+
+  beforeEach(() => {
+    fixture = TestBed.createComponent(TitleComponent);
+    component = fixture.componentInstance;
+    fixture.detectChanges();
+  });
+
+  it('should create', () => {
+    expect(component).toBeTruthy();
+  });
+});

src/app/shared/title/title.component.ts

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+import { Component, Input } from '@angular/core';
+
+@Component({
+  selector: 'app-title',
+  templateUrl: './title.component.html',
+  styleUrls: ['./title.component.scss']
+})
+export class TitleComponent {
+  @Input()
+  message: string;
+}

src/app/tutorials/input/input.component.html

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+<div>
+  <p>You can use @Input to decorate a field making it accept values sent by the component props.</p>
+  <p>For example:</p>
+  <pre>
+    export class TitleComponent {{ '{' }}
+      @Input()
+      message: string;
+    {{ '}' }}
+  </pre>
+
+  <p>And then you can call the component passing a value for message.</p>
+  <pre>
+    &lt;app-title message="Hello world" /&gt;
+  </pre>
+
+  <app-title message="Hello world"></app-title>
+</div>

src/app/tutorials/input/input.component.spec.ts

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+import { async, ComponentFixture, TestBed } from '@angular/core/testing';
+
+import { InputComponent } from './input.component';
+import { SharedModule } from '../../shared/shared.module';
+
+describe('InputComponent', () => {
+  let component: InputComponent;
+  let fixture: ComponentFixture<InputComponent>;
+
+  beforeEach(async(() => {
+    TestBed.configureTestingModule({
+      declarations: [ InputComponent ],
+      imports: [SharedModule],
+    })
+    .compileComponents();
+  }));
+
+  beforeEach(() => {
+    fixture = TestBed.createComponent(InputComponent);
+    component = fixture.componentInstance;
+    fixture.detectChanges();
+  });
+
+  it('should create', () => {
+    expect(component).toBeTruthy();
+  });
+});

src/app/tutorials/input/input.component.ts

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+import { Component, Input } from '@angular/core';
+
+@Component({
+  selector: 'app-input',
+  templateUrl: './input.component.html',
+  styleUrls: ['./input.component.scss']
+})
+export class InputComponent {
+}

src/app/tutorials/tutorials.component.html

@@ -1,8 +1,19 @@
-<div class="container-fluid">
+<div class="Tutorials-container container-fluid">
   <fieldset>
     <legend>TutorialsComponent</legend>
-    <div>
-      Tutorials
+    <div class="row">
+      <div class="col-2">
+        <ul class="Tutorials-menu">
+          <li>
+            <a routerLink="/tutorials/input" [routerLinkActive]="'active'">@Input</a>
+          </li>
+        </ul>
+      </div>
+      <div class="col-10">
+        <div class="container-fluid">
+          <router-outlet></router-outlet>
+        </div>
+      </div>
     </div>
   </fieldset>
 </div>

src/app/tutorials/tutorials.component.scss

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+.Tutorials-container fieldset {
+  padding-top: 0;
+}
+
+.Tutorials-menu {
+  background-color: #f1f1f1;
+  list-style: none;
+  margin: 0;
+  padding: 0;
+}
+
+.Tutorials-menu li {
+  margin: 0;
+}
+
+.Tutorials-menu a {
+  display: block;
+  color: #000;
+  padding: .5em;
+}
+
+.Tutorials-menu a.active {
+  background-color: #4CAF50;
+  color: #fff;
+}

src/app/tutorials/tutorials.router.ts

@@ -1,9 +1,16 @@
 import { NgModule } from '@angular/core';
 import { Routes, RouterModule } from '@angular/router';
 import { TutorialsComponent } from './tutorials.component';
+import { InputComponent } from './input/input.component';
 
 const routes: Routes = [
-  { path: '', component: TutorialsComponent },
+  {
+    path: '',
+    component: TutorialsComponent,
+    children: [
+      { path: 'input', component: InputComponent },
+    ],
+  },
 ];
 
 export const TutorialsRoutingModule = RouterModule.forChild(routes);