Add eslint

.eslintrc.json

@@ -0,0 +1,21 @@
+{
+  "env": {
+    "browser": true,
+    "es2020": true,
+    "jquery": true
+  },
+  "plugins": ["html"],
+  "rules": {
+    "no-eval": "error",
+    "no-undef": "error",
+    "no-unused-vars": [
+      "warn",
+      {
+        "varsIgnorePattern": "^(g_|sendCommand|reload|init)",
+        "argsIgnorePattern": ".*"
+      }
+    ],
+    "eqeqeq": ["warn", "smart"],
+    "no-var": "warn"
+  }
+}

.github/workflows/eslint.yml

@@ -0,0 +1,17 @@
+name: ESLint
+
+on: [push, pull_request]
+
+jobs:
+  eslint:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
+        with:
+          node-version: '20'
+          cache: 'npm'
+      - name: Install dependencies
+        run: npm install
+      - name: Lint JavaScript
+        run: npx eslint web/index.html

.gitignore

@@ -104,3 +104,4 @@ ENV/
 
 # mypy
 .mypy_cache/
+node_modules

package.json

@@ -0,0 +1,8 @@
+{
+  "name": "photo-importer-web",
+  "private": true,
+  "devDependencies": {
+    "eslint": "^8.57.1",
+    "eslint-plugin-html": "^8.1.4"
+  }
+}