Upgrade ESLint to v9.x and update prettier configuration

eslint.config.mjs

@@ -0,0 +1,104 @@
+import eslint from '@eslint/js'
+import tsParser from '@typescript-eslint/parser'
+import eslintPluginUnicorn from 'eslint-plugin-unicorn'
+import eslintPluginPrettierRecommended from 'eslint-plugin-prettier/recommended'
+import eslintPluginReact from 'eslint-plugin-react'
+import eslintPluginReactHooks from 'eslint-plugin-react-hooks'
+import globals from 'globals'
+import typescriptEslint from 'typescript-eslint'
+
+export default typescriptEslint.config(
+  { ignores: ['**/*.d.ts', '**/coverage', '**/dist', 'eslint.config.mjs'] },
+  {
+    extends: [
+      eslint.configs.recommended,
+      ...typescriptEslint.configs.recommended,
+      eslintPluginUnicorn.configs['flat/recommended'],
+      eslintPluginReact.configs.flat.recommended,
+      eslintPluginReact.configs.flat['jsx-runtime'],
+    ],
+    plugins: {
+      'react-hooks': eslintPluginReactHooks,
+    },
+    files: ['packages/**/src/**/*.{js,ts,tsx}'],
+    languageOptions: {
+      globals: {
+        ...globals.browser,
+        ...globals.node,
+      },
+      parser: tsParser,
+      ecmaVersion: 'latest',
+      sourceType: 'module',
+      parserOptions: {
+        ecmaFeatures: {
+          jsx: true,
+        },
+      },
+    },
+    settings: {
+      react: {
+        pragma: 'React',
+        version: 'detect',
+      },
+    },
+    rules: {
+      ...eslintPluginReactHooks.configs.recommended.rules,
+      'no-console': 'off',
+      'no-debugger': 'off',
+      'unicorn/filename-case': 'off',
+      'unicorn/no-array-for-each': 'off',
+      'unicorn/no-null': 'off',
+      'unicorn/prefer-dom-node-append': 'off',
+      'unicorn/prefer-export-from': 'off',
+      'unicorn/prefer-query-selector': 'off',
+      'unicorn/prevent-abbreviations': 'off',
+      'vue/require-default-prop': 'off',
+    },
+  },
+  {
+    files: ['**/*.mjs'],
+    languageOptions: {
+      globals: {
+        ...Object.fromEntries(Object.entries(globals.browser).map(([key]) => [key, 'off'])),
+        ...globals.node,
+      },
+
+      ecmaVersion: 5,
+      sourceType: 'module',
+    },
+  },
+  {
+    files: ['**/__tests__/*.{j,t}s?(x)', '**/tests/unit/**/*.spec.{j,t}s?(x)'],
+    languageOptions: {
+      globals: {
+        ...globals.jest,
+      },
+    },
+  },
+  {
+    files: ['packages/docs/build/**'],
+    languageOptions: {
+      globals: {
+        ...Object.fromEntries(Object.entries(globals.browser).map(([key]) => [key, 'off'])),
+        ...globals.node,
+      },
+
+      ecmaVersion: 5,
+      sourceType: 'commonjs',
+    },
+    rules: {
+      '@typescript-eslint/no-var-requires': 'off',
+      'no-console': 'off',
+      'unicorn/prefer-module': 'off',
+      'unicorn/prefer-top-level-await': 'off',
+    },
+  },
+  {
+    files: ['packages/docs/**'],
+    rules: {
+      '@typescript-eslint/no-var-requires': 'off',
+      'unicorn/prefer-module': 'off',
+    },
+  },
+  eslintPluginPrettierRecommended,
+)

package.json

@@ -22,17 +22,18 @@
     "test:update": "npm-run-all charts:test:update icons:test:update lib:test:update"
   },
   "devDependencies": {
-    "@typescript-eslint/eslint-plugin": "^8.19.0",
-    "@typescript-eslint/parser": "^8.19.0",
-    "eslint": "8.57.0",
+    "@typescript-eslint/parser": "^8.19.1",
+    "eslint": "^9.17.0",
     "eslint-config-prettier": "^9.1.0",
     "eslint-plugin-prettier": "^5.2.1",
     "eslint-plugin-react": "^7.37.3",
     "eslint-plugin-react-hooks": "^5.1.0",
     "eslint-plugin-unicorn": "^56.0.1",
+    "globals": "^15.14.0",
     "lerna": "^8.1.9",
     "npm-run-all": "^4.1.5",
-    "prettier": "^3.4.2"
+    "prettier": "^3.4.2",
+    "typescript-eslint": "^8.19.1"
   },
   "overrides": {
     "gatsby-remark-external-links": {

prettier.config.mjs

@@ -0,0 +1,13 @@
+/**
+ * @see https://prettier.io/docs/en/configuration.html
+ * @type {import("prettier").Config}
+ */
+const config = {
+  printWidth: 100,
+  semi: false,
+  singleQuote: true,
+  tabWidth: 2,
+  trailingComma: 'es5',
+};
+
+export default config;