.eslintrc.js

/** @type import('eslint').Linter.Config */
module.exports = {
  root: true,
  reportUnusedDisableDirectives: true,
  extends: [
    'eslint:recommended',
    'plugin:@typescript-eslint/recommended',
    'plugin:@typescript-eslint/recommended-requiring-type-checking',
    'prettier',
  ],
  parser: '@typescript-eslint/parser',
  parserOptions: {
    project: ['./tsconfig.eslint.json'],
    tsconfigRootDir: __dirname,
    ecmaVersion: 2021,
    sourceType: 'module',
    ecmaFeatures: {
      jsx: true,
    },
  },
  plugins: ['import', '@typescript-eslint'],
  env: {
    node: true,
    es6: true,
  },
  rules: {
    // General
    eqeqeq: ['error', 'always', { null: 'ignore' }],
    radix: 'error',
    'no-duplicate-imports': 'off', // To use TS version

    // Import
    'import/no-default-export': 'error',

    // TS
    '@typescript-eslint/consistent-type-exports': [
      'error',
      { fixMixedExportsWithInlineTypeSpecifier: true },
    ],
    '@typescript-eslint/consistent-type-imports': 'error',
    '@typescript-eslint/explicit-module-boundary-types': 'off',
    '@typescript-eslint/no-duplicate-imports': 'error',
    '@typescript-eslint/no-misused-promises': 'warn', // too noisy, disable?
    '@typescript-eslint/no-unsafe-argument': 'warn',
    '@typescript-eslint/no-unsafe-assignment': 'warn',
    '@typescript-eslint/no-unsafe-call': 'warn',
    '@typescript-eslint/no-unsafe-member-access': 'warn',
    '@typescript-eslint/no-unsafe-return': 'warn',
    '@typescript-eslint/no-use-before-define': ['error', { functions: false, classes: true }],
    '@typescript-eslint/no-unused-vars': [
      'error',
      {
        argsIgnorePattern: '^_',
        varsIgnorePattern: '^_',
        args: 'all',
      },
    ],
    '@typescript-eslint/restrict-template-expressions': 'off',
  },
  overrides: [
    {
      files: ['*.js', '*.jsx'],
      rules: {
        '@typescript-eslint/no-var-requires': 'off',
      },
    },
  ],
};