Add ESLint

.build.yml

@@ -10,7 +10,12 @@ tasks:
 - setup: |
     cd gamja
     npm install --include=dev
+- build: |
+    cd gamja
     npm run build
+- lint: |
+    cd gamja
+    npm run lint
 - deploy: |
     cd gamja/dist
     [ "$(git rev-parse HEAD)" = "$(git rev-parse origin/master)" ] || complete-build

eslint.config.js

@@ -0,0 +1,22 @@
+import globals from "globals";
+import js from "@eslint/js";
+
+export default [
+	js.configs.recommended,
+	{
+		languageOptions: {
+			globals: {
+				...globals.browser,
+				"process": "readonly",
+			},
+		},
+		rules: {
+			"no-case-declarations": "off",
+			"no-unused-vars": ["error", {
+				args: "none",
+				caughtErrorsIgnorePattern: "^_",
+				destructuredArrayIgnorePattern: "^_",
+			}],
+		},
+	},
+];

package.json

@@ -7,8 +7,11 @@
     "preact": "10.17.1"
   },
   "devDependencies": {
+    "@eslint/js": "^9.11.1",
     "@parcel/packager-raw-url": "^2.0.0",
     "@parcel/transformer-webmanifest": "^2.0.0",
+    "eslint": "^9.11.1",
+    "globals": "^15.9.0",
     "node-static": "^0.7.11",
     "parcel": "^2.0.0",
     "split": "^1.0.1",
@@ -16,7 +19,8 @@
   },
   "scripts": {
     "start": "node ./dev-server.js",
-    "build": "parcel build"
+    "build": "parcel build",
+    "lint": "eslint"
   },
   "private": true,
   "targets": {