avanti!

demo-contacts/.editorconfig

@@ -0,0 +1,17 @@
+# Editor configuration, see https://editorconfig.org
+root = true
+
+[*]
+charset = utf-8
+indent_style = space
+indent_size = 2
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+[*.ts]
+quote_type = single
+ij_typescript_use_double_quotes = false
+
+[*.md]
+max_line_length = off
+trim_trailing_whitespace = false

demo-contacts/.gitignore

@@ -0,0 +1,43 @@
+# See https://docs.github.com/get-started/getting-started-with-git/ignoring-files for more about ignoring files.
+
+# Compiled output
+/dist
+/tmp
+/out-tsc
+/bazel-out
+
+# Node
+/node_modules
+npm-debug.log
+yarn-error.log
+
+# IDEs and editors
+.idea/
+.project
+.classpath
+.c9/
+*.launch
+.settings/
+*.sublime-workspace
+
+# Visual Studio Code
+.vscode/*
+!.vscode/settings.json
+!.vscode/tasks.json
+!.vscode/launch.json
+!.vscode/extensions.json
+.history/*
+
+# Miscellaneous
+/.angular/cache
+.sass-cache/
+/connect.lock
+/coverage
+/libpeerconnection.log
+testem.log
+/typings
+__screenshots__/
+
+# System files
+.DS_Store
+Thumbs.db

demo-contacts/.vscode/extensions.json

@@ -0,0 +1,4 @@
+{
+  // For more information, visit: https://go.microsoft.com/fwlink/?linkid=827846
+  "recommendations": ["angular.ng-template"]
+}

demo-contacts/.vscode/launch.json

@@ -0,0 +1,20 @@
+{
+  // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+  "version": "0.2.0",
+  "configurations": [
+    {
+      "name": "ng serve",
+      "type": "chrome",
+      "request": "launch",
+      "preLaunchTask": "npm: start",
+      "url": "http://localhost:4200/"
+    },
+    {
+      "name": "ng test",
+      "type": "chrome",
+      "request": "launch",
+      "preLaunchTask": "npm: test",
+      "url": "http://localhost:9876/debug.html"
+    }
+  ]
+}

demo-contacts/.vscode/tasks.json

@@ -0,0 +1,42 @@
+{
+  // For more information, visit: https://go.microsoft.com/fwlink/?LinkId=733558
+  "version": "2.0.0",
+  "tasks": [
+    {
+      "type": "npm",
+      "script": "start",
+      "isBackground": true,
+      "problemMatcher": {
+        "owner": "typescript",
+        "pattern": "$tsc",
+        "background": {
+          "activeOnStart": true,
+          "beginsPattern": {
+            "regexp": "(.*?)"
+          },
+          "endsPattern": {
+            "regexp": "bundle generation complete"
+          }
+        }
+      }
+    },
+    {
+      "type": "npm",
+      "script": "test",
+      "isBackground": true,
+      "problemMatcher": {
+        "owner": "typescript",
+        "pattern": "$tsc",
+        "background": {
+          "activeOnStart": true,
+          "beginsPattern": {
+            "regexp": "(.*?)"
+          },
+          "endsPattern": {
+            "regexp": "bundle generation complete"
+          }
+        }
+      }
+    }
+  ]
+}

demo-contacts/README.md

@@ -0,0 +1,59 @@
+# DemoContacts
+
+This project was generated using [Angular CLI](https://github.com/angular/angular-cli) version 21.0.1.
+
+## Development server
+
+To start a local development server, run:
+
+```bash
+ng serve
+```
+
+Once the server is running, open your browser and navigate to `http://localhost:4200/`. The application will automatically reload whenever you modify any of the source files.
+
+## Code scaffolding
+
+Angular CLI includes powerful code scaffolding tools. To generate a new component, run:
+
+```bash
+ng generate component component-name
+```
+
+For a complete list of available schematics (such as `components`, `directives`, or `pipes`), run:
+
+```bash
+ng generate --help
+```
+
+## Building
+
+To build the project run:
+
+```bash
+ng build
+```
+
+This will compile your project and store the build artifacts in the `dist/` directory. By default, the production build optimizes your application for performance and speed.
+
+## Running unit tests
+
+To execute unit tests with the [Vitest](https://vitest.dev/) test runner, use the following command:
+
+```bash
+ng test
+```
+
+## Running end-to-end tests
+
+For end-to-end (e2e) testing, run:
+
+```bash
+ng e2e
+```
+
+Angular CLI does not come with an end-to-end testing framework by default. You can choose one that suits your needs.
+
+## Additional Resources
+
+For more information on using the Angular CLI, including detailed command references, visit the [Angular CLI Overview and Command Reference](https://angular.dev/tools/cli) page.

demo-contacts/angular.json

@@ -0,0 +1,79 @@
+{
+  "$schema": "./node_modules/@angular/cli/lib/config/schema.json",
+  "version": 1,
+  "cli": {
+    "packageManager": "npm",
+    "analytics": false
+  },
+  "newProjectRoot": "projects",
+  "projects": {
+    "demo-contacts": {
+      "projectType": "application",
+      "schematics": {},
+      "root": "",
+      "sourceRoot": "src",
+      "prefix": "app",
+      "architect": {
+        "build": {
+          "builder": "@angular/build:application",
+          "options": {
+            "browser": "src/main.ts",
+            "tsConfig": "tsconfig.app.json",
+            "assets": [
+              {
+                "glob": "**/*",
+                "input": "public"
+              }
+            ],
+            "styles": [
+              "src/styles.css"
+            ],
+            "server": "src/main.server.ts",
+            "outputMode": "server",
+            "ssr": {
+              "entry": "src/server.ts"
+            }
+          },
+          "configurations": {
+            "production": {
+              "budgets": [
+                {
+                  "type": "initial",
+                  "maximumWarning": "500kB",
+                  "maximumError": "1MB"
+                },
+                {
+                  "type": "anyComponentStyle",
+                  "maximumWarning": "4kB",
+                  "maximumError": "8kB"
+                }
+              ],
+              "outputHashing": "all"
+            },
+            "development": {
+              "optimization": false,
+              "extractLicenses": false,
+              "sourceMap": true
+            }
+          },
+          "defaultConfiguration": "production"
+        },
+        "serve": {
+          "builder": "@angular/build:dev-server",
+          "configurations": {
+            "production": {
+              "buildTarget": "demo-contacts:build:production"
+            },
+            "development": {
+              "buildTarget": "demo-contacts:build:development"
+            }
+          },
+          "defaultConfiguration": "development"
+        },
+        "test": {
+          "builder": "@angular/build:unit-test"
+        }
+      }
+    }
+  }
+}

demo-contacts/package.json

@@ -0,0 +1,49 @@
+{
+  "name": "demo-contacts",
+  "version": "0.0.0",
+  "scripts": {
+    "ng": "ng",
+    "start": "ng serve",
+    "build": "ng build",
+    "watch": "ng build --watch --configuration development",
+    "test": "ng test",
+    "serve:ssr:demo-contacts": "node dist/demo-contacts/server/server.mjs"
+  },
+  "prettier": {
+    "printWidth": 100,
+    "singleQuote": true,
+    "overrides": [
+      {
+        "files": "*.html",
+        "options": {
+          "parser": "angular"
+        }
+      }
+    ]
+  },
+  "private": true,
+  "packageManager": "npm@11.6.0",
+  "dependencies": {
+    "@angular/common": "^21.0.0",
+    "@angular/compiler": "^21.0.0",
+    "@angular/core": "^21.0.0",
+    "@angular/forms": "^21.0.0",
+    "@angular/platform-browser": "^21.0.0",
+    "@angular/platform-server": "^21.0.0",
+    "@angular/router": "^21.0.0",
+    "@angular/ssr": "^21.0.1",
+    "express": "^5.1.0",
+    "rxjs": "~7.8.0",
+    "tslib": "^2.3.0"
+  },
+  "devDependencies": {
+    "@angular/build": "^21.0.1",
+    "@angular/cli": "^21.0.1",
+    "@angular/compiler-cli": "^21.0.0",
+    "@types/express": "^5.0.1",
+    "@types/node": "^20.17.19",
+    "jsdom": "^27.1.0",
+    "typescript": "~5.9.2",
+    "vitest": "^4.0.8"
+  }
+}

demo-contacts/src/app/app.config.server.ts

@@ -0,0 +1,12 @@
+import { mergeApplicationConfig, ApplicationConfig } from '@angular/core';
+import { provideServerRendering, withRoutes } from '@angular/ssr';
+import { appConfig } from './app.config';
+import { serverRoutes } from './app.routes.server';
+
+const serverConfig: ApplicationConfig = {
+  providers: [
+    provideServerRendering(withRoutes(serverRoutes))
+  ]
+};
+
+export const config = mergeApplicationConfig(appConfig, serverConfig);

demo-contacts/src/app/app.config.ts

@@ -0,0 +1,12 @@
+import { ApplicationConfig, provideBrowserGlobalErrorListeners } from '@angular/core';
+import { provideRouter } from '@angular/router';
+
+import { routes } from './app.routes';
+import { provideClientHydration, withEventReplay } from '@angular/platform-browser';
+
+export const appConfig: ApplicationConfig = {
+  providers: [
+    provideBrowserGlobalErrorListeners(),
+    provideRouter(routes), provideClientHydration(withEventReplay()),
+  ]
+};

demo-contacts/src/app/app.html

@@ -0,0 +1,5 @@
+<main>
+  <app-contact-book></app-contact-book>
+</main>
+
+<router-outlet />

demo-contacts/src/app/app.routes.server.ts

@@ -0,0 +1,8 @@
+import { RenderMode, ServerRoute } from '@angular/ssr';
+
+export const serverRoutes: ServerRoute[] = [
+  {
+    path: '**',
+    renderMode: RenderMode.Prerender
+  }
+];

demo-contacts/src/app/app.routes.ts

@@ -0,0 +1,3 @@
+import { Routes } from '@angular/router';
+
+export const routes: Routes = [];

demo-contacts/src/app/app.spec.ts

@@ -0,0 +1,23 @@
+import { TestBed } from '@angular/core/testing';
+import { App } from './app';
+
+describe('App', () => {
+  beforeEach(async () => {
+    await TestBed.configureTestingModule({
+      imports: [App],
+    }).compileComponents();
+  });
+
+  it('should create the app', () => {
+    const fixture = TestBed.createComponent(App);
+    const app = fixture.componentInstance;
+    expect(app).toBeTruthy();
+  });
+
+  it('should render title', async () => {
+    const fixture = TestBed.createComponent(App);
+    await fixture.whenStable();
+    const compiled = fixture.nativeElement as HTMLElement;
+    expect(compiled.querySelector('h1')?.textContent).toContain('Hello, demo-contacts');
+  });
+});

demo-contacts/src/app/app.ts

@@ -0,0 +1,13 @@
+import { Component, signal } from '@angular/core';
+import { RouterOutlet } from '@angular/router';
+import { ContactBook } from "./contact-book/contact-book";
+
+@Component({
+  selector: 'app-root',
+  imports: [RouterOutlet, ContactBook],
+  templateUrl: './app.html',
+  styleUrl: './app.css'
+})
+export class App {
+  protected readonly title = signal('demo-contacts');
+}

demo-contacts/src/app/contact-book-service.spec.ts

@@ -0,0 +1,16 @@
+import { TestBed } from '@angular/core/testing';
+
+import { ContactBookService } from './contact-book-service';
+
+describe('ContactBookService', () => {
+  let service: ContactBookService;
+
+  beforeEach(() => {
+    TestBed.configureTestingModule({});
+    service = TestBed.inject(ContactBookService);
+  });
+
+  it('should be created', () => {
+    expect(service).toBeTruthy();
+  });
+});

demo-contacts/src/app/contact-book-service.ts

@@ -0,0 +1,45 @@
+import { Injectable, signal } from '@angular/core';
+import { Contact } from './contact';
+
+@Injectable({
+  providedIn: 'root',
+})
+export class ContactBookService {
+  selectedContact = signal<Contact | undefined>(undefined)
+
+  contacts = signal<Contact[]> ([
+  {
+    id: 0,
+    name: "Federico Volpini",
+    phone: "050 621 3140",
+    email: "federico.volpini@isti.cnr.it"
+  },
+  {
+    id: 1,
+    name: "Giuseppe Lipari",
+    phone: "050 621 3140",
+    email: "giuseppe.lipari@isti.cnr.it"
+  }])
+
+  private nextId: number = this.contacts.length + 1
+
+  list(){
+    return this.contacts()
+  }
+
+  addContact(c: Contact){
+    c.id = this.nextId
+    this.contacts.update(contacts => [...contacts, c])
+  }
+
+  selectContact(c: Contact){
+    console.log("selected", c)
+    this.selectedContact.set(c)
+    
+  }
+
+  getContact(): Contact | undefined{
+    console.log("we")
+    return this.selectedContact()
+  }
+}

demo-contacts/src/app/contact-book/contact-book.html

@@ -0,0 +1,6 @@
+<h1>Contact Book</h1>
+<div class="d-flex justify-content-between">
+    <app-contact-form/>
+    <app-contact-list/>
+    <app-contact-detail/>
+</div>

demo-contacts/src/app/contact-book/contact-book.spec.ts

@@ -0,0 +1,23 @@
+import { ComponentFixture, TestBed } from '@angular/core/testing';
+
+import { ContactBook } from './contact-book';
+
+describe('ContactBook', () => {
+  let component: ContactBook;
+  let fixture: ComponentFixture<ContactBook>;
+
+  beforeEach(async () => {
+    await TestBed.configureTestingModule({
+      imports: [ContactBook]
+    })
+    .compileComponents();
+
+    fixture = TestBed.createComponent(ContactBook);
+    component = fixture.componentInstance;
+    await fixture.whenStable();
+  });
+
+  it('should create', () => {
+    expect(component).toBeTruthy();
+  });
+});

demo-contacts/src/app/contact-book/contact-book.ts

@@ -0,0 +1,13 @@
+import { Component } from '@angular/core';
+import { ContactDetail } from './contact-detail/contact-detail';
+import { ContactForm } from './contact-form/contact-form';
+import { ContactList } from './contact-list/contact-list';
+
+@Component({
+  selector: 'app-contact-book',
+  imports: [ContactDetail, ContactForm, ContactList],
+  templateUrl: './contact-book.html',
+  styleUrl: './contact-book.css',
+})
+export class ContactBook {
+}

demo-contacts/src/app/contact-book/contact-detail/contact-detail.html

@@ -0,0 +1,10 @@
+<div class="p-2 m-2">
+    <h2>Contact Detail</h2>
+    @if (contact !== undefined){
+        <p>Name: {{contact()?.name}}</p>
+        <p>Phone: {{contact()?.phone}}</p>
+        <p>Email: {{contact()?.email}}</p>
+    } @else {
+        <p class="alert alert-warning">Select a contact</p>
+    }
+</div>

demo-contacts/src/app/contact-book/contact-detail/contact-detail.spec.ts

@@ -0,0 +1,23 @@
+import { ComponentFixture, TestBed } from '@angular/core/testing';
+
+import { ContactDetail } from './contact-detail';
+
+describe('ContactDetail', () => {
+  let component: ContactDetail;
+  let fixture: ComponentFixture<ContactDetail>;
+
+  beforeEach(async () => {
+    await TestBed.configureTestingModule({
+      imports: [ContactDetail]
+    })
+    .compileComponents();
+
+    fixture = TestBed.createComponent(ContactDetail);
+    component = fixture.componentInstance;
+    await fixture.whenStable();
+  });
+
+  it('should create', () => {
+    expect(component).toBeTruthy();
+  });
+});

demo-contacts/src/app/contact-book/contact-detail/contact-detail.ts

@@ -0,0 +1,16 @@
+import { Component, computed, inject, Input, signal } from '@angular/core';
+import { Contact } from '../../contact';
+import { ContactBookService } from '../../contact-book-service';
+
+@Component({
+  selector: 'app-contact-detail',
+  imports: [],
+  templateUrl: './contact-detail.html',
+  styleUrl: './contact-detail.css',
+})
+export class ContactDetail {
+  private cs = inject(ContactBookService)
+
+  contact = computed (()=> this.cs.getContact())
+
+}

demo-contacts/src/app/contact-book/contact-form/contact-form.html

@@ -0,0 +1,6 @@
+<div class="p-2 m-2">
+    <h2>Add Contact</h2>
+    <form [formGroup]="contactForm">
+
+    </form>
+</div>

demo-contacts/src/app/contact-book/contact-form/contact-form.spec.ts

@@ -0,0 +1,23 @@
+import { ComponentFixture, TestBed } from '@angular/core/testing';
+
+import { ContactForm } from './contact-form';
+
+describe('ContactForm', () => {
+  let component: ContactForm;
+  let fixture: ComponentFixture<ContactForm>;
+
+  beforeEach(async () => {
+    await TestBed.configureTestingModule({
+      imports: [ContactForm]
+    })
+    .compileComponents();
+
+    fixture = TestBed.createComponent(ContactForm);
+    component = fixture.componentInstance;
+    await fixture.whenStable();
+  });
+
+  it('should create', () => {
+    expect(component).toBeTruthy();
+  });
+});

demo-contacts/src/app/contact-book/contact-form/contact-form.ts

@@ -0,0 +1,16 @@
+import { Component } from '@angular/core';
+import { FormGroup, ReactiveFormsModule, FormControl, Validators } from '@angular/forms';
+
+@Component({
+  selector: 'app-contact-form',
+  imports: [ReactiveFormsModule],
+  templateUrl: './contact-form.html',
+  styleUrl: './contact-form.css',
+})
+export class ContactForm {
+  contactForm = new FormGroup({
+    name: new FormControl("", [Validators.required]),
+    phone: new FormControl("", [Validators.required]),
+    email: new FormControl("", [Validators.required, Validators.email])
+  })
+}

demo-contacts/src/app/contact-book/contact-list/contact-list.html

@@ -0,0 +1,13 @@
+<div class="p-2 m-2">
+    <h2>Contacts</h2>
+    <input class="w-100" type="text" />
+    <ul class="list-group">
+    @for (contact of listC(); track contact.id){
+        <li (click)="detail(contact)" class="list-group-item">
+            <h5> {{ contact.name }}</h5>
+            <p>{{contact.phone}} - {{contact.email}}</p>
+        </li>
+    }
+    </ul>
+</div>
+

demo-contacts/src/app/contact-book/contact-list/contact-list.spec.ts

@@ -0,0 +1,23 @@
+import { ComponentFixture, TestBed } from '@angular/core/testing';
+
+import { ContactList } from './contact-list';
+
+describe('ContactList', () => {
+  let component: ContactList;
+  let fixture: ComponentFixture<ContactList>;
+
+  beforeEach(async () => {
+    await TestBed.configureTestingModule({
+      imports: [ContactList]
+    })
+    .compileComponents();
+
+    fixture = TestBed.createComponent(ContactList);
+    component = fixture.componentInstance;
+    await fixture.whenStable();
+  });
+
+  it('should create', () => {
+    expect(component).toBeTruthy();
+  });
+});

demo-contacts/src/app/contact-book/contact-list/contact-list.ts

@@ -0,0 +1,20 @@
+import { Component, computed, EventEmitter, inject, Output } from '@angular/core';
+import { ContactBookService } from '../../contact-book-service';
+import { Contact } from '../../contact';
+
+@Component({
+  selector: 'app-contact-list',
+  imports: [],
+  templateUrl: './contact-list.html',
+  styleUrl: './contact-list.css',
+})
+export class ContactList {
+  listC = computed ( () => this.cs.list())
+  private cs = inject(ContactBookService)
+
+ 
+
+  detail(c: Contact) {
+    this.cs.selectContact(c)
+  }
+}

demo-contacts/src/app/contact.ts

@@ -0,0 +1,6 @@
+export type Contact = {
+    id: number,
+    name: string,
+    phone: string,
+    email: string
+}

demo-contacts/src/index.html

@@ -0,0 +1,16 @@
+<!doctype html>
+<html lang="en">
+<head>
+  <meta charset="utf-8">
+  <title>DemoContacts</title>
+  <base href="/">
+  <meta name="viewport" content="width=device-width, initial-scale=1">
+  <link rel="icon" type="image/x-icon" href="favicon.ico">
+  <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.8/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-sRIl4kxILFvY47J16cr9ZwB07vP4J8+LH7qKQnuqkuIAvNWLzeN8tE5YBujZqJLB" crossorigin="anonymous">
+</head>
+<body>
+  <app-root></app-root>
+<script src="https://cdn.jsdelivr.net/npm/@popperjs/core@2.11.8/dist/umd/popper.min.js" integrity="sha384-I7E8VVD/ismYTF4hNIPjVp/Zjvgyol6VFvRkX/vR+Vc4jQkC+hVqc2pM8ODewa9r" crossorigin="anonymous"></script>
+<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.8/dist/js/bootstrap.min.js" integrity="sha384-G/EV+4j2dNv+tEPo3++6LCgdCROaejBqfUeNjuKAiuXbjrxilcCdDz6ZAVfHWe1Y" crossorigin="anonymous"></script>  <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.8/dist/js/bootstrap.bundle.min.js" integrity="sha384-FKyoEForCGlyvwx9Hj09JcYn3nv7wiPVlz7YYwJrWVcXK/BmnVDxM+D2scQbITxI" crossorigin="anonymous"></script>
+</body>
+</html>

demo-contacts/src/main.server.ts

@@ -0,0 +1,8 @@
+import { BootstrapContext, bootstrapApplication } from '@angular/platform-browser';
+import { App } from './app/app';
+import { config } from './app/app.config.server';
+
+const bootstrap = (context: BootstrapContext) =>
+    bootstrapApplication(App, config, context);
+
+export default bootstrap;

demo-contacts/src/main.ts

@@ -0,0 +1,6 @@
+import { bootstrapApplication } from '@angular/platform-browser';
+import { appConfig } from './app/app.config';
+import { App } from './app/app';
+
+bootstrapApplication(App, appConfig)
+  .catch((err) => console.error(err));

demo-contacts/src/server.ts

@@ -0,0 +1,68 @@
+import {
+  AngularNodeAppEngine,
+  createNodeRequestHandler,
+  isMainModule,
+  writeResponseToNodeResponse,
+} from '@angular/ssr/node';
+import express from 'express';
+import { join } from 'node:path';
+
+const browserDistFolder = join(import.meta.dirname, '../browser');
+
+const app = express();
+const angularApp = new AngularNodeAppEngine();
+
+/**
+ * Example Express Rest API endpoints can be defined here.
+ * Uncomment and define endpoints as necessary.
+ *
+ * Example:
+ * ```ts
+ * app.get('/api/{*splat}', (req, res) => {
+ *   // Handle API request
+ * });
+ * ```
+ */
+
+/**
+ * Serve static files from /browser
+ */
+app.use(
+  express.static(browserDistFolder, {
+    maxAge: '1y',
+    index: false,
+    redirect: false,
+  }),
+);
+
+/**
+ * Handle all other requests by rendering the Angular application.
+ */
+app.use((req, res, next) => {
+  angularApp
+    .handle(req)
+    .then((response) =>
+      response ? writeResponseToNodeResponse(response, res) : next(),
+    )
+    .catch(next);
+});
+
+/**
+ * Start the server if this module is the main entry point, or it is ran via PM2.
+ * The server listens on the port defined by the `PORT` environment variable, or defaults to 4000.
+ */
+if (isMainModule(import.meta.url) || process.env['pm_id']) {
+  const port = process.env['PORT'] || 4000;
+  app.listen(port, (error) => {
+    if (error) {
+      throw error;
+    }
+
+    console.log(`Node Express server listening on http://localhost:${port}`);
+  });
+}
+
+/**
+ * Request handler used by the Angular CLI (for dev-server and during build) or Firebase Cloud Functions.
+ */
+export const reqHandler = createNodeRequestHandler(app);

demo-contacts/src/styles.css

@@ -0,0 +1 @@
+/* You can add global styles to this file, and also import other style files */

demo-contacts/tsconfig.app.json

@@ -0,0 +1,17 @@
+/* To learn more about Typescript configuration file: https://www.typescriptlang.org/docs/handbook/tsconfig-json.html. */
+/* To learn more about Angular compiler options: https://angular.dev/reference/configs/angular-compiler-options. */
+{
+  "extends": "./tsconfig.json",
+  "compilerOptions": {
+    "outDir": "./out-tsc/app",
+    "types": [
+      "node"
+    ]
+  },
+  "include": [
+    "src/**/*.ts"
+  ],
+  "exclude": [
+    "src/**/*.spec.ts"
+  ]
+}

demo-contacts/tsconfig.json

@@ -0,0 +1,33 @@
+/* To learn more about Typescript configuration file: https://www.typescriptlang.org/docs/handbook/tsconfig-json.html. */
+/* To learn more about Angular compiler options: https://angular.dev/reference/configs/angular-compiler-options. */
+{
+  "compileOnSave": false,
+  "compilerOptions": {
+    "strict": true,
+    "noImplicitOverride": true,
+    "noPropertyAccessFromIndexSignature": true,
+    "noImplicitReturns": true,
+    "noFallthroughCasesInSwitch": true,
+    "skipLibCheck": true,
+    "isolatedModules": true,
+    "experimentalDecorators": true,
+    "importHelpers": true,
+    "target": "ES2022",
+    "module": "preserve"
+  },
+  "angularCompilerOptions": {
+    "enableI18nLegacyMessageIdFormat": false,
+    "strictInjectionParameters": true,
+    "strictInputAccessModifiers": true,
+    "strictTemplates": true
+  },
+  "files": [],
+  "references": [
+    {
+      "path": "./tsconfig.app.json"
+    },
+    {
+      "path": "./tsconfig.spec.json"
+    }
+  ]
+}

demo-contacts/tsconfig.spec.json

@@ -0,0 +1,15 @@
+/* To learn more about Typescript configuration file: https://www.typescriptlang.org/docs/handbook/tsconfig-json.html. */
+/* To learn more about Angular compiler options: https://angular.dev/reference/configs/angular-compiler-options. */
+{
+  "extends": "./tsconfig.json",
+  "compilerOptions": {
+    "outDir": "./out-tsc/spec",
+    "types": [
+      "vitest/globals"
+    ]
+  },
+  "include": [
+    "src/**/*.d.ts",
+    "src/**/*.spec.ts"
+  ]
+}

demo/src/app/app.html

@@ -1,4 +1,4 @@
-<main class="m-2">
+<main class="container p-2">
   <!--
 <app-product-component></app-product-component>
 <app-phones></app-phones>
@@ -10,6 +10,8 @@
 <app-form-profile></app-form-profile>
 
 <app-template-driven-form></app-template-driven-form>
-  -->
+
 <app-registration-form></app-registration-form>
+  -->
+<app-directive-component></app-directive-component>
 </main>

demo/src/app/app.ts

@@ -6,10 +6,11 @@ import { UserCardComponent } from './user-card-component/user-card-component';
 import { FormProfile } from './form-profile/form-profile';
 import { TemplateDrivenForm } from './template-driven-form/template-driven-form';
 import { RegistrationForm } from './registration-form/registration-form';
+import { DirectiveComponent } from "./directive-component/directive-component";
 
 @Component({
   selector: 'app-root',
-  imports: [RegistrationForm],
+  imports: [DirectiveComponent],
   templateUrl: './app.html',
   styleUrl: './app.css'
 })

demo/src/app/directive-component/directive-component.css

@@ -0,0 +1,7 @@
+input{
+    border-width: 3px;
+}
+
+.hl-red{
+    border-color:red
+}

demo/src/app/directive-component/directive-component.html

@@ -0,0 +1,9 @@
+<div class="mb-3">
+    <label for="myname" class="form-label">Name</label>
+    <input
+        type="text"
+        class="form-control"
+        appHighlightEmpty
+    />
+</div>
+

demo/src/app/directive-component/directive-component.spec.ts

@@ -0,0 +1,23 @@
+import { ComponentFixture, TestBed } from '@angular/core/testing';
+
+import { DirectiveComponent } from './directive-component';
+
+describe('DirectiveComponent', () => {
+  let component: DirectiveComponent;
+  let fixture: ComponentFixture<DirectiveComponent>;
+
+  beforeEach(async () => {
+    await TestBed.configureTestingModule({
+      imports: [DirectiveComponent]
+    })
+    .compileComponents();
+
+    fixture = TestBed.createComponent(DirectiveComponent);
+    component = fixture.componentInstance;
+    await fixture.whenStable();
+  });
+
+  it('should create', () => {
+    expect(component).toBeTruthy();
+  });
+});

demo/src/app/directive-component/directive-component.ts

@@ -0,0 +1,12 @@
+import { Component, NgModule } from '@angular/core';
+import { HighlightEmpty } from '../highlight-empty';
+
+@Component({
+  selector: 'app-directive-component',
+  imports: [HighlightEmpty],
+  templateUrl: './directive-component.html',
+  styleUrl: './directive-component.css',
+})
+export class DirectiveComponent {
+ 
+}

demo/src/app/highlight-empty.ts

@@ -0,0 +1,30 @@
+import { Directive, ElementRef, HostListener, Input, Renderer2, SimpleChange } from '@angular/core';
+
+@Directive({
+  selector: '[appHighlightEmpty]',
+})
+export class HighlightEmpty {
+  constructor(private el: ElementRef, private renderer: Renderer2) { }
+  
+  @HostListener('input',['$event.target'])
+  onInput(target:EventTarget | null):void{
+    const value = (target as any).value
+    this._updateBorder(value)
+  }
+  
+  ngOnInit():void {
+    this._updateBorder(this.el.nativeElement.value)
+  }
+
+  private _updateBorder(value: string){
+    console.log(value.length)
+    if (value.length > 0){
+      this.renderer.removeClass(this.el.nativeElement, "hl-red")
+    } else {
+      this.renderer.addClass(this.el.nativeElement, "hl-red")
+    }
+  }
+
+
+  
+}