chore(eslint): migrate to flat config and simplify

eslint.config.mjs

@@ -0,0 +1,108 @@
+import eslint from '@eslint/js'
+import vitest from '@vitest/eslint-plugin'
+import importPlugin from 'eslint-plugin-import'
+import jestDom from 'eslint-plugin-jest-dom'
+import react from 'eslint-plugin-react'
+import reactCompiler from 'eslint-plugin-react-compiler'
+import reactHooks from 'eslint-plugin-react-hooks'
+import testingLibrary from 'eslint-plugin-testing-library'
+import tseslint from 'typescript-eslint'
+
+export default tseslint.config(
+  {
+    ignores: ['dist/', 'examples/', 'website/'],
+  },
+  eslint.configs.recommended,
+  importPlugin.flatConfigs.recommended,
+  tseslint.configs.recommended,
+  react.configs.flat.recommended,
+  react.configs.flat['jsx-runtime'],
+  {
+    plugins: {
+      'react-compiler': reactCompiler,
+      'react-hooks': reactHooks,
+    },
+    settings: {
+      react: {
+        version: 'detect',
+      },
+      'import/resolver': {
+        typescript: true,
+      },
+    },
+    rules: {
+      eqeqeq: 'error',
+      curly: ['warn', 'multi-line', 'consistent'],
+      'sort-imports': [
+        'error',
+        {
+          ignoreDeclarationSort: true,
+        },
+      ],
+      'import/no-unresolved': ['error', { commonjs: true, amd: true }],
+      'import/named': 'off',
+      'import/namespace': 'off',
+      'import/no-named-as-default-member': 'off',
+      'import/no-duplicates': 'error',
+      'import/extensions': ['error', 'always'],
+      'import/order': [
+        'error',
+        {
+          alphabetize: { order: 'asc', caseInsensitive: true },
+          groups: [
+            'builtin',
+            'external',
+            'internal',
+            'parent',
+            'sibling',
+            'index',
+            'object',
+          ],
+          'newlines-between': 'never',
+          pathGroups: [
+            {
+              pattern: 'react',
+              group: 'builtin',
+              position: 'before',
+            },
+          ],
+          pathGroupsExcludedImportTypes: ['builtin'],
+        },
+      ],
+      '@typescript-eslint/no-explicit-any': 'off',
+      '@typescript-eslint/no-unused-vars': [
+        'warn',
+        { argsIgnorePattern: '^_', varsIgnorePattern: '^_' },
+      ],
+      'react-compiler/react-compiler': 'warn',
+      ...reactHooks.configs.recommended.rules,
+    },
+  },
+  {
+    files: ['tests/**/*.{ts,tsx}'],
+    ...testingLibrary.configs['flat/react'],
+    ...jestDom.configs['flat/recommended'],
+    ...vitest.configs.recommended,
+    rules: {
+      'import/extensions': ['error', 'never'],
+      '@typescript-eslint/no-unused-vars': 'off',
+      'vitest/expect-expect': 'off',
+      'vitest/consistent-test-it': [
+        'error',
+        { fn: 'it', withinDescribe: 'it' },
+      ],
+    },
+  },
+  {
+    files: ['src/vanilla/utils/proxyMap.ts', 'src/vanilla/utils/proxySet.ts'],
+    rules: {
+      '@typescript-eslint/no-unused-expressions': 'off',
+    },
+  },
+  {
+    files: ['*.js'],
+    rules: {
+      '@typescript-eslint/no-require-imports': 'off',
+    },
+  },
+)

package.json

@@ -63,11 +63,11 @@
     "build:react_utils": "rollup -c --config-react_utils",
     "postbuild": "pnpm patch-d-ts && pnpm copy && pnpm patch-old-ts && pnpm patch-esm-ts",
     "prettier": "prettier '*.{js,json,md}' '{src,tests,docs}/**/*.{ts,tsx,md,mdx}' --write",
-    "eslint": "eslint --no-eslintrc --c .eslintrc.json --fix '*.{js,ts}' '{src,tests}/**/*.{ts,tsx}'",
+    "eslint": "eslint . --fix",
     "test": "pnpm run '/^test:.*/'",
     "test:format": "prettier '*.{js,json,md}' '{src,tests,docs}/**/*.{ts,tsx,md,mdx}' --list-different",
     "test:types": "tsc --noEmit",
-    "test:lint": "eslint --no-eslintrc --c .eslintrc.json '*.{js,ts}' '{src,tests}/**/*.{ts,tsx}'",
+    "test:lint": "eslint .",
     "test:spec": "vitest run",
     "patch-d-ts": "node -e \"var {entries}=require('./rollup.config.js');require('shelljs').find('dist/**/*.d.ts').forEach(f=>{entries.forEach(({find,replacement})=>require('shelljs').sed('-i',new RegExp(' from \\''+find.source.slice(0,-1)+'\\';$'),' from \\''+replacement+'\\';',f));require('shelljs').sed('-i',/ from '(\\.[^']+)\\.ts';$/,' from \\'\\$1\\';',f)})\"",
     "copy": "shx cp -r dist/src/* dist/esm && shx cp -r dist/src/* dist && shx rm -rf dist/{src,tests} && shx cp package.json readme.md LICENSE dist && json -I -f dist/package.json -e \"this.private=false; this.devDependencies=undefined; this.optionalDependencies=undefined; this.scripts=undefined; this.prettier=undefined;\"",
@@ -106,6 +106,7 @@
     "proxy-compare": "^3.0.0"
   },
   "devDependencies": {
+    "@eslint/js": "^9.17.0",
     "@redux-devtools/extension": "^3.3.0",
     "@rollup/plugin-alias": "^5.1.1",
     "@rollup/plugin-node-resolve": "^15.3.0",
@@ -116,22 +117,18 @@
     "@types/jsdom": "^21.1.7",
     "@types/react": "^18.3.12",
     "@types/react-dom": "^18.3.1",
-    "@typescript-eslint/eslint-plugin": "^8.13.0",
-    "@typescript-eslint/parser": "^8.13.0",
     "@vitest/coverage-v8": "^2.1.4",
-    "@vitest/eslint-plugin": "^1.1.7",
+    "@vitest/eslint-plugin": "^1.1.21",
     "@vitest/ui": "^2.1.4",
     "esbuild": "^0.24.0",
-    "eslint": "8.57.0",
-    "eslint-config-prettier": "^9.1.0",
-    "eslint-import-resolver-alias": "^1.1.2",
+    "eslint": "9.17.0",
+    "eslint-import-resolver-typescript": "^3.7.0",
     "eslint-plugin-import": "^2.31.0",
-    "eslint-plugin-jest-dom": "^5.4.0",
-    "eslint-plugin-prettier": "^5.2.1",
-    "eslint-plugin-react": "^7.37.2",
-    "eslint-plugin-react-compiler": "19.0.0-beta-8a03594-20241020",
-    "eslint-plugin-react-hooks": "^5.0.0",
-    "eslint-plugin-testing-library": "^6.4.0",
+    "eslint-plugin-jest-dom": "^5.5.0",
+    "eslint-plugin-react": "^7.37.3",
+    "eslint-plugin-react-compiler": "19.0.0-beta-b2e8e9c-20241220",
+    "eslint-plugin-react-hooks": "^5.1.0",
+    "eslint-plugin-testing-library": "^7.1.1",
     "jest-leak-detector": "^29.7.0",
     "jsdom": "^25.0.1",
     "json": "^11.0.0",
@@ -148,6 +145,7 @@
     "ts-expect": "^1.3.0",
     "tslib": "^2.8.1",
     "typescript": "^5.6.3",
+    "typescript-eslint": "^8.18.2",
     "vite": "^5.4.10",
     "vitest": "^2.1.4"
   },