chore(eslint): migrate eslint configuration .eslintrc.json to eslint.…

…config.js

eslint.config.js

@@ -0,0 +1,142 @@
+const eslint = require('@eslint/js')
+const vitest = require('@vitest/eslint-plugin')
+const importPlugin = require('eslint-plugin-import')
+const jestDom = require('eslint-plugin-jest-dom')
+const prettierRecommended = require(
+  require.resolve('eslint-plugin-prettier/recommended'),
+)
+const react = require('eslint-plugin-react')
+const reactCompiler = require('eslint-plugin-react-compiler')
+const reactHooks = require('eslint-plugin-react-hooks')
+const testingLibrary = require('eslint-plugin-testing-library')
+const globals = require('globals')
+const tseslint = require('typescript-eslint')
+
+module.exports = tseslint.config(
+  eslint.configs.recommended,
+  tseslint.configs.recommended,
+  react.configs.flat['jsx-runtime'],
+  importPlugin.flatConfigs.errors,
+  importPlugin.flatConfigs.warnings,
+  {
+    languageOptions: {
+      globals: {
+        ...globals.browser,
+        ...globals['shared-node-browser'],
+        ...globals.node,
+        ...globals.es2015,
+      },
+      parser: tseslint.parser,
+      parserOptions: {
+        ecmaVersion: 2018,
+        sourceType: 'module',
+        ecmaFeatures: {
+          jsx: true,
+        },
+      },
+    },
+    plugins: {
+      'react-compiler': reactCompiler,
+      'react-hooks': reactHooks,
+    },
+    settings: {
+      react: {
+        version: 'detect',
+      },
+      'import/extensions': ['.js', '.jsx', '.ts', '.tsx'],
+      'import/parsers': {
+        '@typescript-eslint/parser': ['.js', '.jsx', '.ts', '.tsx'],
+      },
+      'import/resolver': {
+        alias: {
+          extensions: ['.js', '.jsx', '.ts', '.tsx'],
+          map: [
+            ['^valtio$', './src/index.ts'],
+            ['valtio', './src'],
+          ],
+        },
+      },
+    },
+    rules: {
+      ...reactHooks.configs.recommended.rules,
+      'react-compiler/react-compiler': 'warn',
+      'import/namespace': 'off',
+      'import/named': 'off',
+      eqeqeq: 'error',
+      'no-var': 'error',
+      'prefer-const': 'error',
+      curly: ['warn', 'multi-line', 'consistent'],
+      'no-console': 'off',
+      'import/extensions': ['error', 'always'],
+      'import/no-unresolved': ['error', { commonjs: true, amd: true }],
+      'import/export': 'error',
+      'import/no-duplicates': ['error'],
+      '@typescript-eslint/explicit-module-boundary-types': 'off',
+      '@typescript-eslint/no-unused-vars': [
+        'warn',
+        { argsIgnorePattern: '^_', varsIgnorePattern: '^_' },
+      ],
+      '@typescript-eslint/no-use-before-define': 'off',
+      '@typescript-eslint/no-empty-function': 'off',
+      '@typescript-eslint/no-explicit-any': 'off',
+      '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'],
+        },
+      ],
+      'sort-imports': [
+        'error',
+        {
+          ignoreDeclarationSort: true,
+        },
+      ],
+    },
+  },
+  {
+    files: ['tests/**/*.{ts,tsx}'],
+    ...testingLibrary.configs['flat/react'],
+    ...jestDom.configs['flat/recommended'],
+    ...vitest.configs.recommended,
+    rules: {
+      'import/extensions': ['error', 'never'],
+      'vitest/expect-expect': 'off',
+      'vitest/consistent-test-it': [
+        'error',
+        { fn: 'it', withinDescribe: 'it' },
+      ],
+      '@typescript-eslint/no-unused-vars': 'off',
+    },
+  },
+  {
+    files: ['*.js'],
+    rules: {
+      '@typescript-eslint/no-require-imports': 'off',
+    },
+  },
+  {
+    files: ['src/vanilla/utils/proxyMap.ts', 'src/vanilla/utils/proxySet.ts'],
+    rules: {
+      '@typescript-eslint/no-unused-expressions': 'off',
+    },
+  },
+  prettierRecommended,
+)