.eslintrc.js

module.exports = {
  root: true,
  env: {
    node: true,
    mocha: true,
  },
  overrides: [
    {
      files: ['*.ts'],
      parser: '@typescript-eslint/parser',
      parserOptions: {
        project: './tsconfig.json',
        tsconfigRootDir: __dirname,
        ecmaVersion: 2020,
        sourceType: 'module',
      },
      rules: {
        'no-console': process.env.NODE_ENV === 'production' ? 'error' : 'off',
        'no-debugger': process.env.NODE_ENV === 'production' ? 'error' : 'off',
        'linebreak-style': process.env.NODE_ENV === 'production' ? ['error', 'windows'] : ['off', 'windows'],
        '@typescript-eslint/no-empty-function': ['error', { allow: ['constructors'] }],
        '@typescript-eslint/no-unused-expressions': 'off',
        '@typescript-eslint/no-floating-promises': 'error',
        '@typescript-eslint/await-thenable': 'warn',
        'class-methods-use-this': 'off',
      },
      plugins: [
        'import',
      ],
      extends: [
        'airbnb-typescript/base',
      ],
    }
  ],
};