migrate ESLint 8 to 9

Author: ryota-murakami

.eslintignore

@@ -5,5 +5,3 @@ updates:
     directory: '/'
     schedule:
       interval: 'daily'
-    ignore:
-      - dependency-name: 'eslint'

.eslintrc.cjs

@@ -0,0 +1,55 @@
+import path from 'node:path'
+import { fileURLToPath } from 'node:url'
+
+import { fixupPluginRules } from '@eslint/compat'
+import { FlatCompat } from '@eslint/eslintrc'
+import js from '@eslint/js'
+import tsParser from '@typescript-eslint/parser'
+import jsxA11Y from 'eslint-plugin-jsx-a11y'
+import reactHooks from 'eslint-plugin-react-hooks'
+
+const __filename = fileURLToPath(import.meta.url)
+const __dirname = path.dirname(__filename)
+const compat = new FlatCompat({
+  baseDirectory: __dirname,
+  recommendedConfig: js.configs.recommended,
+  allConfig: js.configs.all,
+})
+
+export default [
+  {
+    ignores: [
+      '**/.vscode',
+      '**/node_modules',
+      '**/build',
+      '**/dist',
+      '**/.github',
+      '**/.idea',
+      'public/mockServiceWorker.js',
+    ],
+  },
+  ...compat.extends('ts-prefixer', 'plugin:jsx-a11y/recommended'),
+  {
+    plugins: {
+      'react-hooks': fixupPluginRules(reactHooks),
+      'jsx-a11y': jsxA11Y,
+    },
+
+    languageOptions: {
+      globals: {},
+      parser: tsParser,
+      ecmaVersion: 5,
+      sourceType: 'script',
+
+      parserOptions: {
+        project: ['tsconfig.json'],
+      },
+    },
+
+    settings: {},
+
+    rules: {
+      'react-hooks/rules-of-hooks': 'error',
+    },
+  },
+]

.github/dependabot.yml

@@ -16,8 +16,8 @@
     "test": "vitest --run",
     "test:ui": "vitest --ui",
     "test:watch": "vitest",
-    "lint": "eslint . --ext .ts,.tsx,.js,jsx,cjs,mjs",
-    "lint:fix": "eslint . --ext .ts,.tsx,.js,jsx,cjs,mjs --fix",
+    "lint": "eslint . -c eslint.config.mjs",
+    "lint:fix": "eslint . -c eslint.config.mjs --fix",
     "typecheck": "tsc --noEmit",
     "prettier": "prettier --ignore-unknown --write .",
     "clean": "rimraf node_modules pnpm-lock.yaml dist",
@@ -32,6 +32,9 @@
     "react-router-dom": "^6.28.0"
   },
   "devDependencies": {
+    "@eslint/compat": "^1.2.3",
+    "@eslint/eslintrc": "^3.2.0",
+    "@eslint/js": "^9.16.0",
     "@tailwindcss/aspect-ratio": "^0.4.2",
     "@tailwindcss/forms": "^0.5.9",
     "@tailwindcss/line-clamp": "^0.4.4",
@@ -40,18 +43,18 @@
     "@testing-library/jest-dom": "^6.6.3",
     "@testing-library/react": "^16.0.1",
     "@testing-library/user-event": "^14.5.2",
-    "@types/eslint": "^8.56.7",
+    "@types/eslint": "^9.6.1",
     "@types/react": "^18.3.12",
     "@types/react-dom": "^18.3.1",
-    "@typescript-eslint/eslint-plugin": "^7.18.0",
-    "@typescript-eslint/parser": "^7.18.0",
+    "@typescript-eslint/eslint-plugin": "^8.16.0",
+    "@typescript-eslint/parser": "^8.16.0",
     "@vitejs/plugin-react-swc": "^3.7.2",
     "@vitest/ui": "^1.4.0",
     "all-contributors-cli": "^6.26.1",
     "autoprefixer": "^10.4.20",
     "concurrently": "^9.1.0",
     "cross-fetch": "^4.0.0",
-    "eslint": "^8.57.0",
+    "eslint": "^9.16.0",
     "eslint-config-prettier": "^9.1.0",
     "eslint-config-ts-prefixer": "^1.14.0",
     "eslint-import-resolver-typescript": "^3.6.3",