feat(challenge 47): typescript enums vs union types

apps/typescript/enums-vs-union-types/.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/typescript/enums-vs-union-types/README.md

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+# Enums vs Union Types
+
+> author: thomas-laforge
+
+### Run Application
+
+```bash
+npx nx serve typescript-enums-vs-union-types
+```
+
+### Documentation and Instruction
+
+Challenge documentation is [here](https://angular-challenges.vercel.app/challenges/typescript/47-enums-vs-union-types/).

apps/typescript/enums-vs-union-types/project.json

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+{
+  "name": "typescript-enums-vs-union-types",
+  "$schema": "../../../node_modules/nx/schemas/project-schema.json",
+  "projectType": "application",
+  "prefix": "app",
+  "sourceRoot": "apps/typescript/enums-vs-union-types/src",
+  "tags": [],
+  "targets": {
+    "build": {
+      "executor": "@angular-devkit/build-angular:application",
+      "outputs": ["{options.outputPath}"],
+      "options": {
+        "outputPath": "dist/apps/typescript/enums-vs-union-types",
+        "index": "apps/typescript/enums-vs-union-types/src/index.html",
+        "browser": "apps/typescript/enums-vs-union-types/src/main.ts",
+        "polyfills": ["zone.js"],
+        "tsConfig": "apps/typescript/enums-vs-union-types/tsconfig.app.json",
+        "inlineStyleLanguage": "scss",
+        "assets": [
+          "apps/typescript/enums-vs-union-types/src/favicon.ico",
+          "apps/typescript/enums-vs-union-types/src/assets"
+        ],
+        "styles": ["apps/typescript/enums-vs-union-types/src/styles.scss"],
+        "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": "typescript-enums-vs-union-types:build:production"
+        },
+        "development": {
+          "buildTarget": "typescript-enums-vs-union-types:build:development"
+        }
+      },
+      "defaultConfiguration": "development"
+    },
+    "extract-i18n": {
+      "executor": "@angular-devkit/build-angular:extract-i18n",
+      "options": {
+        "buildTarget": "typescript-enums-vs-union-types:build"
+      }
+    },
+    "lint": {
+      "executor": "@nx/eslint:lint",
+      "outputs": ["{options.outputFile}"]
+    }
+  }
+}

apps/typescript/enums-vs-union-types/src/app/app.component.ts

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+import { Component, computed, signal } from '@angular/core';
+
+enum Difficulty {
+  EASY = 'easy',
+  NORMAL = 'normal',
+}
+
+enum Direction {
+  LEFT = 'left',
+  RIGHT = 'right',
+}
+
+@Component({
+  standalone: true,
+  imports: [],
+  selector: 'app-root',
+  template: `
+    <section>
+      <div>
+        <button mat-stroked-button (click)="difficulty.set(Difficulty.EASY)">
+          Easy
+        </button>
+        <button mat-stroked-button (click)="difficulty.set(Difficulty.NORMAL)">
+          Normal
+        </button>
+      </div>
+      <p>Selected Difficulty: {{ difficultyLabel() }}</p>
+    </section>
+
+    <section>
+      <div>
+        <button mat-stroked-button (click)="direction.set(Direction.LEFT)">
+          Left
+        </button>
+        <button mat-stroked-button (click)="direction.set(Direction.RIGHT)">
+          Right
+        </button>
+      </div>
+      <p>{{ directionLabel() }}</p>
+    </section>
+  `,
+  styles: `
+    section {
+      @apply flex flex-col mx-auto my-5 w-fit gap-2 items-center;
+
+      > div {
+        @apply flex w-fit gap-5;
+      }
+    }
+
+     button {
+      @apply rounded-md border px-4 py-2;
+     }
+  `,
+})
+export class AppComponent {
+  readonly Difficulty = Difficulty;
+  readonly difficulty = signal<Difficulty>(Difficulty.EASY);
+
+  readonly Direction = Direction;
+  readonly direction = signal<Direction | undefined>(undefined);
+
+  readonly difficultyLabel = computed<string>(() => {
+    switch (this.difficulty()) {
+      case Difficulty.EASY:
+        return Difficulty.EASY;
+      case Difficulty.NORMAL:
+        return Difficulty.NORMAL;
+    }
+  });
+
+  readonly directionLabel = computed<string>(() => {
+    const prefix = 'You choosed to go';
+    switch (this.direction()) {
+      case Direction.LEFT:
+        return `${prefix} ${Direction.LEFT}`;
+      case Direction.RIGHT:
+        return `${prefix} ${Direction.RIGHT}`;
+      default:
+        return 'Choose a direction!';
+    }
+  });
+}

apps/typescript/enums-vs-union-types/src/app/app.config.ts

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+import { ApplicationConfig } from '@angular/core';
+
+export const appConfig: ApplicationConfig = {
+  providers: [],
+};

apps/typescript/enums-vs-union-types/src/index.html

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+<!doctype html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8" />
+    <title>typescript-enums-vs-union-types</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/typescript/enums-vs-union-types/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/typescript/enums-vs-union-types/src/styles.scss

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+@tailwind base;
+@tailwind components;
+@tailwind utilities;
+
+/* You can add global styles to this file, and also import other style files */

apps/typescript/enums-vs-union-types/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/typescript/enums-vs-union-types/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/typescript/enums-vs-union-types/tsconfig.editor.json

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+{
+  "extends": "./tsconfig.json",
+  "include": ["src/**/*.ts"],
+  "compilerOptions": {
+    "types": []
+  }
+}

apps/typescript/enums-vs-union-types/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.app.json",
+    },
+    {
+      "path": "./tsconfig.editor.json",
+    },
+  ],
+  "extends": "../../../tsconfig.base.json",
+  "angularCompilerOptions": {
+    "enableI18nLegacyMessageIdFormat": false,
+    "strictInjectionParameters": true,
+    "strictInputAccessModifiers": true,
+    "strictTemplates": true,
+  },
+}