Additions/55 back button navigation (#1016)

feat: new angular back button navigation challenge

apps/angular/55-back-button-navigation/.eslintrc.json

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+{
+  "extends": ["../../../.eslintrc.json"],
+  "ignorePatterns": ["!**/*"],
+  "overrides": [
+    {
+      "files": ["*.ts"],
+      "extends": [
+        "plugin:@nx/angular",
+        "plugin:@angular-eslint/template/process-inline-templates"
+      ],
+      "rules": {
+        "@angular-eslint/directive-selector": [
+          "error",
+          {
+            "type": "attribute",
+            "prefix": "app",
+            "style": "camelCase"
+          }
+        ],
+        "@angular-eslint/component-selector": [
+          "error",
+          {
+            "type": "element",
+            "prefix": "app",
+            "style": "kebab-case"
+          }
+        ]
+      }
+    },
+    {
+      "files": ["*.html"],
+      "extends": ["plugin:@nx/angular-template"],
+      "rules": {}
+    }
+  ]
+}

apps/angular/55-back-button-navigation/README.md

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+# Back-Button-Navigation
+
+> author: ioannis-tsironis
+
+### Run Application
+
+```bash
+npx nx serve angular-back-button-navigation
+```
+
+### Documentation and Instruction
+
+Challenge documentation is [here](https://angular-challenges.vercel.app/challenges/angular/55-back-button-navigation/).

apps/angular/55-back-button-navigation/jest.config.ts

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+/* eslint-disable */
+export default {
+  displayName: 'angular-back-button-navigation',
+  preset: '../../../jest.preset.js',
+  setupFilesAfterEnv: ['<rootDir>/src/test-setup.ts'],
+  coverageDirectory: '../../../coverage/apps/angular/55-back-button-navigation',
+  transform: {
+    '^.+\\.(ts|mjs|js|html)$': [
+      'jest-preset-angular',
+      {
+        tsconfig: '<rootDir>/tsconfig.spec.json',
+        stringifyContentPathRegex: '\\.(html|svg)$',
+      },
+    ],
+  },
+  transformIgnorePatterns: ['node_modules/(?!.*\\.mjs$)'],
+  snapshotSerializers: [
+    'jest-preset-angular/build/serializers/no-ng-attributes',
+    'jest-preset-angular/build/serializers/ng-snapshot',
+    'jest-preset-angular/build/serializers/html-comment',
+  ],
+};

apps/angular/55-back-button-navigation/project.json

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+{
+  "name": "angular-back-button-navigation",
+  "$schema": "../../../node_modules/nx/schemas/project-schema.json",
+  "projectType": "application",
+  "prefix": "app",
+  "sourceRoot": "apps/angular/55-back-button-navigation/src",
+  "tags": [],
+  "targets": {
+    "build": {
+      "executor": "@angular-devkit/build-angular:application",
+      "outputs": ["{options.outputPath}"],
+      "options": {
+        "outputPath": "dist/apps/angular/55-back-button-navigation",
+        "index": "apps/angular/55-back-button-navigation/src/index.html",
+        "browser": "apps/angular/55-back-button-navigation/src/main.ts",
+        "polyfills": ["zone.js"],
+        "tsConfig": "apps/angular/55-back-button-navigation/tsconfig.app.json",
+        "inlineStyleLanguage": "scss",
+        "assets": [
+          {
+            "glob": "**/*",
+            "input": "apps/angular/55-back-button-navigation/public"
+          }
+        ],
+        "styles": [
+          "apps/angular/55-back-button-navigation/src/styles.scss",
+          "node_modules/@angular/material/prebuilt-themes/indigo-pink.css"
+        ],
+        "scripts": []
+      },
+      "configurations": {
+        "production": {
+          "budgets": [
+            {
+              "type": "initial",
+              "maximumWarning": "500kb",
+              "maximumError": "1mb"
+            },
+            {
+              "type": "anyComponentStyle",
+              "maximumWarning": "2kb",
+              "maximumError": "4kb"
+            }
+          ],
+          "outputHashing": "all"
+        },
+        "development": {
+          "optimization": false,
+          "extractLicenses": false,
+          "sourceMap": true
+        }
+      },
+      "defaultConfiguration": "production"
+    },
+    "serve": {
+      "executor": "@angular-devkit/build-angular:dev-server",
+      "configurations": {
+        "production": {
+          "buildTarget": "angular-back-button-navigation:build:production"
+        },
+        "development": {
+          "buildTarget": "angular-back-button-navigation:build:development"
+        }
+      },
+      "defaultConfiguration": "development"
+    },
+    "extract-i18n": {
+      "executor": "@angular-devkit/build-angular:extract-i18n",
+      "options": {
+        "buildTarget": "angular-back-button-navigation:build"
+      }
+    },
+    "lint": {
+      "executor": "@nx/eslint:lint"
+    },
+    "test": {
+      "executor": "@nx/jest:jest",
+      "outputs": ["{workspaceRoot}/coverage/{projectRoot}"],
+      "options": {
+        "jestConfig": "apps/angular/55-back-button-navigation/jest.config.ts"
+      }
+    }
+  }
+}

apps/angular/55-back-button-navigation/src/app/app.component.html

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+<router-outlet></router-outlet>

apps/angular/55-back-button-navigation/src/app/app.component.ts

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+import { Component } from '@angular/core';
+import { RouterLink, RouterOutlet } from '@angular/router';
+
+@Component({
+  standalone: true,
+  imports: [RouterOutlet, RouterLink],
+  selector: 'app-root',
+  templateUrl: './app.component.html',
+})
+export class AppComponent {}

apps/angular/55-back-button-navigation/src/app/app.config.ts

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+import { ApplicationConfig, provideZoneChangeDetection } from '@angular/core';
+import { provideRouter } from '@angular/router';
+import { APP_ROUTES } from './app.routes';
+
+export const appConfig: ApplicationConfig = {
+  providers: [
+    provideZoneChangeDetection({ eventCoalescing: true }),
+    provideRouter(APP_ROUTES),
+  ],
+};

apps/angular/55-back-button-navigation/src/app/app.routes.ts

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+import { Routes } from '@angular/router';
+import { HomeComponent } from './home/home.component';
+import { SensitiveActionComponent } from './sensitive-action/sensitive-action.component';
+import { SimpleActionComponent } from './simple-action/simple-action.component';
+
+export const APP_ROUTES: Routes = [
+  {
+    path: '',
+    pathMatch: 'full',
+    redirectTo: 'home',
+  },
+  {
+    path: 'home',
+    component: HomeComponent,
+  },
+  {
+    path: 'simple-action',
+    component: SimpleActionComponent,
+  },
+  {
+    path: 'sensitive-action',
+    component: SensitiveActionComponent,
+  },
+];

apps/angular/55-back-button-navigation/src/app/dialog/dialog.component.html

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+<h2 mat-dialog-title>Delete file</h2>
+<mat-dialog-content>Would you like to delete cat.jpeg?</mat-dialog-content>
+<mat-dialog-actions>
+  <button mat-button mat-dialog-close>No</button>
+  <button mat-button mat-dialog-close cdkFocusInitial>Ok</button>
+</mat-dialog-actions>

apps/angular/55-back-button-navigation/src/app/dialog/dialog.component.ts

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+import { ChangeDetectionStrategy, Component, inject } from '@angular/core';
+import { MatButtonModule } from '@angular/material/button';
+import {
+  MatDialogActions,
+  MatDialogClose,
+  MatDialogContent,
+  MatDialogRef,
+  MatDialogTitle,
+} from '@angular/material/dialog';
+
+@Component({
+  selector: 'app-dialog-dialog',
+  templateUrl: './dialog.component.html',
+  standalone: true,
+  imports: [
+    MatButtonModule,
+    MatDialogActions,
+    MatDialogClose,
+    MatDialogTitle,
+    MatDialogContent,
+  ],
+  changeDetection: ChangeDetectionStrategy.OnPush,
+})
+export class DialogComponent {
+  readonly dialogRef = inject(MatDialogRef<DialogComponent>);
+}

apps/angular/55-back-button-navigation/src/app/home/home.component.html

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+<a mat-raised-button routerLink="/simple-action" routerLinkActive="active">
+  Go to simple dialog action page
+</a>
+
+<a mat-raised-button routerLink="/sensitive-action" routerLinkActive="active">
+  Go to sensitive dialog action page
+</a>

apps/angular/55-back-button-navigation/src/app/home/home.component.ts

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+import { Component } from '@angular/core';
+import { MatButtonModule } from '@angular/material/button';
+import { RouterLink } from '@angular/router';
+
+@Component({
+  standalone: true,
+  imports: [MatButtonModule, RouterLink],
+  selector: 'app-home',
+  templateUrl: './home.component.html',
+})
+export class HomeComponent {}

apps/angular/55-back-button-navigation/src/app/sensitive-action/sensitive-action.component.html

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+<button mat-raised-button (click)="openDialog()">
+  Open dialog with confirmation dialog on browser back button click
+</button>

apps/angular/55-back-button-navigation/src/app/sensitive-action/sensitive-action.component.ts

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+import { Component, inject } from '@angular/core';
+import { MatButtonModule } from '@angular/material/button';
+import { MatDialog } from '@angular/material/dialog';
+import { DialogComponent } from '../dialog/dialog.component';
+
+@Component({
+  standalone: true,
+  imports: [MatButtonModule],
+  selector: 'app-sensitive-action',
+  templateUrl: './sensitive-action.component.html',
+})
+export class SensitiveActionComponent {
+  readonly #dialog = inject(MatDialog);
+
+  openDialog(): void {
+    this.#dialog.open(DialogComponent, {
+      width: '250px',
+    });
+  }
+}

apps/angular/55-back-button-navigation/src/app/simple-action/simple-action.component.html

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+<button mat-raised-button (click)="openDialog()">Open simple dialog</button>

apps/angular/55-back-button-navigation/src/app/simple-action/simple-action.component.ts

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+import { Component, inject } from '@angular/core';
+import { MatButtonModule } from '@angular/material/button';
+import { MatDialog } from '@angular/material/dialog';
+import { DialogComponent } from '../dialog/dialog.component';
+
+@Component({
+  standalone: true,
+  imports: [MatButtonModule],
+  selector: 'app-simple-action',
+  templateUrl: './simple-action.component.html',
+})
+export class SimpleActionComponent {
+  readonly #dialog = inject(MatDialog);
+
+  openDialog(): void {
+    this.#dialog.open(DialogComponent, {
+      width: '250px',
+    });
+  }
+}

apps/angular/55-back-button-navigation/src/index.html

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+<!doctype html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8" />
+    <title>angular-back-button-navigation</title>
+    <base href="/" />
+    <meta name="viewport" content="width=device-width, initial-scale=1" />
+    <link rel="icon" type="image/x-icon" href="favicon.ico" />
+  </head>
+  <body>
+    <app-root></app-root>
+  </body>
+</html>

apps/angular/55-back-button-navigation/src/main.ts

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

apps/angular/55-back-button-navigation/src/styles.scss

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+@use '@angular/material' as mat;
+
+/* You can add global styles to this file, and also import other style files */
+
+@tailwind base;
+@tailwind components;
+@tailwind utilities;
+
+@include mat.core();
+
+$theme-primary: mat.m2-define-palette(mat.$m2-indigo-palette);
+$theme-accent: mat.m2-define-palette(mat.$m2-pink-palette, A200, A100, A400);
+
+$theme-warn: mat.m2-define-palette(mat.$m2-red-palette);
+
+$theme: mat.m2-define-light-theme(
+  (
+    color: (
+      primary: $theme-primary,
+      accent: $theme-accent,
+      warn: $theme-warn,
+    ),
+    typography: mat.m2-define-typography-config(),
+  )
+);
+
+@include mat.dialog-theme($theme);
+@include mat.button-theme($theme);

apps/angular/55-back-button-navigation/src/test-setup.ts

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+import '@testing-library/jest-dom';
+import 'jest-preset-angular/setup-jest';

apps/angular/55-back-button-navigation/tailwind.config.js

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+const { createGlobPatternsForDependencies } = require('@nx/angular/tailwind');
+const { join } = require('path');
+
+/** @type {import('tailwindcss').Config} */
+module.exports = {
+  content: [
+    join(__dirname, 'src/**/!(*.stories|*.spec).{ts,html}'),
+    ...createGlobPatternsForDependencies(__dirname),
+  ],
+  theme: {
+    extend: {},
+  },
+  plugins: [],
+};

apps/angular/55-back-button-navigation/tsconfig.app.json

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+{
+  "extends": "./tsconfig.json",
+  "compilerOptions": {
+    "outDir": "../../../dist/out-tsc",
+    "types": []
+  },
+  "files": ["src/main.ts"],
+  "include": ["src/**/*.d.ts"],
+  "exclude": ["jest.config.ts", "src/**/*.test.ts", "src/**/*.spec.ts"]
+}

apps/angular/55-back-button-navigation/tsconfig.editor.json

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+{
+  "extends": "./tsconfig.json",
+  "include": ["src/**/*.ts"],
+  "compilerOptions": {},
+  "exclude": ["jest.config.ts", "src/**/*.test.ts", "src/**/*.spec.ts"]
+}

apps/angular/55-back-button-navigation/tsconfig.json

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+{
+  "compilerOptions": {
+    "target": "es2022",
+    "useDefineForClassFields": false,
+    "esModuleInterop": true,
+    "forceConsistentCasingInFileNames": true,
+    "strict": true,
+    "noImplicitOverride": true,
+    "noPropertyAccessFromIndexSignature": true,
+    "noImplicitReturns": true,
+    "noFallthroughCasesInSwitch": true
+  },
+  "files": [],
+  "include": [],
+  "references": [
+    {
+      "path": "./tsconfig.editor.json"
+    },
+    {
+      "path": "./tsconfig.app.json"
+    },
+    {
+      "path": "./tsconfig.spec.json"
+    }
+  ],
+  "extends": "../../../tsconfig.base.json",
+  "angularCompilerOptions": {
+    "enableI18nLegacyMessageIdFormat": false,
+    "strictInjectionParameters": true,
+    "strictInputAccessModifiers": true,
+    "strictTemplates": true
+  }
+}

apps/angular/55-back-button-navigation/tsconfig.spec.json

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+{
+  "extends": "./tsconfig.json",
+  "compilerOptions": {
+    "outDir": "../../dist/out-tsc",
+    "module": "commonjs",
+    "types": ["jest", "node", "@testing-library/jest-dom"]
+  },
+  "files": ["src/test-setup.ts"],
+  "include": [
+    "jest.config.ts",
+    "src/**/*.test.ts",
+    "src/**/*.spec.ts",
+    "src/**/*.d.ts"
+  ]
+}