Unit testing

.github/workflows/cd-pages.yml

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+# Simple workflow for deploying static content to GitHub Pages
+name: Deploy static content to Pages
+
+on:
+  # Runs on pushes targeting the default branch
+  push:
+    branches: ["main"]
+
+  # Allows you to run this workflow manually from the Actions tab
+  workflow_dispatch:
+
+# Sets permissions of the GITHUB_TOKEN to allow deployment to GitHub Pages
+permissions:
+  contents: read
+  pages: write
+  id-token: write
+
+# Allow only one concurrent deployment, skipping runs queued between the run in-progress and latest queued.
+# However, do NOT cancel in-progress runs as we want to allow these production deployments to complete.
+concurrency:
+  group: "pages"
+  cancel-in-progress: false
+
+jobs:
+  # Single deploy job since we're just deploying
+  deploy:
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Setup Pages
+        uses: actions/configure-pages@v5
+      - name: Upload artifact
+        uses: actions/upload-pages-artifact@v3
+        with:
+          # Upload entire repository
+          path: './public'
+      - name: Deploy to GitHub Pages
+        id: deployment
+        uses: actions/deploy-pages@v5

.github/workflows/ci.yml

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+name: CI
+
+on:
+  push:
+    branches:
+      - main
+    #   - dev
+  pull_request:
+    branches:
+      - main
+    #   - dev
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+concurrency:
+  group: ci-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  static-site-checks:
+    name: Static site checks
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v6
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: 24
+          cache: npm
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Run unit tests
+        run: npm test
+
+        # TODO: Re-enable formatting check once we have a consistent style and a formatter in place.
+        # Prettier formatting
+    #   - name: Check formatting
+    #     run: npm run format:check
+
+      - name: Lint JavaScript
+        run: npm run lint:js
+
+        # TODO: Re-enable HTML validation once we have a consistent style and the necessary configuration in place.
+        # html-validate
+    #   - name: Validate HTML
+    #     run: npm run lint:html
+
+      - name: Verify public site files exist
+        run: |
+          test -f public/index.html
+          test -d public/assets
+
+      - name: Check links
+        run: npm run check:links

eslint.config.js

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+export default [
+    {
+        ignores: [
+            "node_modules/**",
+            "dist/**",
+            "coverage/**",
+            "public/vendor/**",
+        ],
+    },
+    {
+        files: [
+            "public/assets/js/**/*.js",
+            "tests/**/*.js",
+        ],
+        languageOptions: {
+            ecmaVersion: "latest",
+            sourceType: "module",
+            globals: {
+                document: "readonly",
+                window: "readonly",
+                Event: "readonly",
+                MouseEvent: "readonly",
+                console: "readonly",
+                URL: "readonly",
+                process: "readonly",
+            },
+        },
+        rules: {
+            "no-unused-vars": [
+                "error",
+                {
+                    argsIgnorePattern: "^_",
+                    varsIgnorePattern: "^_",
+                },
+            ],
+            "no-undef": "error",
+            "no-console": "warn",
+            "prefer-const": "error",
+            "eqeqeq": [
+                "error",
+                "always",
+            ],
+        },
+    },
+];