eslint.config.mjs

import { fixupConfigRules, fixupPluginRules } from '@eslint/compat';
import typescriptEslint from '@typescript-eslint/eslint-plugin';
import _import from 'eslint-plugin-import';
import prettier from 'eslint-plugin-prettier';
import unusedImports from 'eslint-plugin-unused-imports';
import globals from 'globals';
import tsParser from '@typescript-eslint/parser';
import path from 'node:path';
import { fileURLToPath } from 'node:url';
import js from '@eslint/js';
import { FlatCompat } from '@eslint/eslintrc';

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 [
  ...fixupConfigRules(
    compat.extends(
      'eslint:recommended',
      'plugin:react/recommended',
      'plugin:@next/next/recommended',
      'plugin:@typescript-eslint/eslint-recommended',
      'plugin:@typescript-eslint/recommended',
      'plugin:import/typescript',
      'plugin:prettier/recommended',
    ),
  ),
  {
    plugins: {
      '@typescript-eslint': fixupPluginRules(typescriptEslint),
      import: fixupPluginRules(_import),
      prettier: fixupPluginRules(prettier),
      'unused-imports': unusedImports,
    },

    languageOptions: {
      globals: {
        ...globals.browser,
        ...globals.node,
      },

      parser: tsParser,
      ecmaVersion: 2018,
      sourceType: 'module',

      parserOptions: {
        ecmaFeatures: {
          jsx: true,
        },
      },
    },

    settings: {
      'import/extensions': ['.js', '.ts'],

      react: {
        version: 'detect',
      },
    },

    rules: {
      '@typescript-eslint/explicit-function-return-type': 'off',

      '@typescript-eslint/no-empty-interface': [
        'error',
        {
          allowSingleExtends: true,
        },
      ],

      '@typescript-eslint/no-unused-vars': 'error',

      'comma-dangle': [
        'error',
        {
          arrays: 'always-multiline',
          objects: 'always-multiline',
          imports: 'always-multiline',
          exports: 'always-multiline',
          functions: 'always-multiline',
        },
      ],

      'import/no-deprecated': 'warn',

      'react/jsx-no-duplicate-props': [
        2,
        {
          ignoreCase: false,
        },
      ],

      'react/no-unknown-property': [
        2,
        {
          ignore: ['netlify-honeypot'],
        },
      ],

      'react/prop-types': 'off',
      'react/react-in-jsx-scope': 'off',
      'unused-imports/no-unused-imports': 'error',
      'unused-imports/no-unused-vars': 'error',
    },
  },
  {
    files: ['**/*.js', '**/*.jsx'],

    rules: {
      '@typescript-eslint/no-var-requires': 'off',
    },
  },
];