.eslintrc.js

module.exports = {
  extends: ['airbnb', 'airbnb-typescript', 'eslint:recommended', 'prettier'],
  env: {
    browser: true,
    es2021: true,
    node: true,
  },
  parser: '@typescript-eslint/parser',
  parserOptions: {
    project: ['./tsconfig.eslint.json', './*/tsconfig.json'],
    sourceType: 'module',
    tsconfigRootDir: __dirname,
  },
  plugins: ['@typescript-eslint', 'import', 'simple-import-sort'],
  root: true,
  rules: {
    'react/jsx-props-no-spreading': 'off',
    'react/react-in-jsx-scope': 'off',
    'no-param-reassign': 'off',
    'react/require-default-props': 'off',
    'import/prefer-default-export': 'off',
  },
  settings: {
    'import/parsers': {
      '@typescript-eslint/parser': ['.ts', '.tsx'],
    },
    'import/resolver': {
      typescript: {
        alwaysTryTypes: true, // always try to resolve types under `<root>@types` directory even it doesn't contain any source code, like `@types/unist`
        project: ['./tsconfig.eslint.json', './*/tsconfig.json'],
      },
    },
  },
  overrides: [
    {
      files: ['*.ts', '*.tsx'],
      rules: {
        'no-undef': 'off',
      },
    },
    {
      files: ['backend/**/*.ts', 'backend/**/*.js'],
      rules: {
        '@typescript-eslint/no-explicit-any': 'off',
        '@typescript-eslint/no-misused-promises': [
          'error',
          {
            checksVoidReturn: false,
          },
        ],
        '@typescript-eslint/no-non-null-assertion': 'off',
        '@typescript-eslint/no-shadow': 'off',
        '@typescript-eslint/no-throw-literal': 'off',
        '@typescript-eslint/no-unused-vars': 'off',
        'consistent-return': 'off',
        'no-console': 'off',
        'no-undef': 'off',
        'no-underscore-dangle': 'off',
        'no-unused-vars': 'off',
        'simple-import-sort/imports': [
          'error',
          {
            groups: [
              // Packages packages come first.
              ['^@?\\w'],
              // Internal packages.
              [
                '^(constants|controllers|lib|middlewares|policies|routes|services|socket|structures|types|utils)(/.*|$)',
              ],
              // Side effect imports.
              ['^\\u0000'],
              // Parent imports. Put `..` last.
              ['^\\.\\.(?!/?$)', '^\\.\\./?$'],
              // Other relative imports. Put same-folder imports and `.` last.
              ['^\\./(?=.*/)(?!/?$)', '^\\.(?!/?$)', '^\\./?$'],
              ['^\\./(?=.*/)(?!/?$)', '^\\.(?!/?$)', '^\\./?$'],
            ],
          },
        ],
      },
    },
  ],
};