.eslintrc.js

'use strict';

module.exports = {
  root: true,

  parserOptions: {
    ecmaVersion: 2018,
    sourceType: 'script',
  },
  plugins: ['prettier'],
  extends: ['plugin:prettier/recommended'],
  env: {
    node: true,
  },
  rules: {
    strict: 'error',
    'no-var': 'error',
    'no-console': 'off',
    'no-process-exit': 'off',
    'object-shorthand': 'error',
  },
  overrides: [
    {
      files: ['**/*.ts'],
      parser: '@typescript-eslint/parser',
      parserOptions: {
        sourceType: 'module',
      },
      plugins: ['@typescript-eslint'],
      extends: ['plugin:@typescript-eslint/recommended'],
      rules: {
        '@typescript-eslint/indent': ['error', 2],
        '@typescript-eslint/explicit-function-return-type': 'off',
        '@typescript-eslint/explicit-member-accessibility': 'off',
      },
    },
    {
      files: ['test/**/*.js'],
      plugins: ['mocha'],
      env: {
        mocha: true,
      },
      rules: {
        'mocha/no-exclusive-tests': 'error',
        'mocha/handle-done-callback': 'error',
      },
    },
  ],
};