.eslintrc.js

module.exports = {
  root: true,
  parserOptions: {
    ecmaVersion: 2018,
    sourceType: 'module'
  },
  extends: [
    'eslint:recommended',
    'plugin:prettier/recommended',
  ],
  rules: {},
  overrides: [
    // node files
    {
      files: [
        '.template-lintrc.js',
        'ember-cli-build.js',
        'index.js',
        'testem.js',
        'blueprints/*/index.js',
        'config/**/*.js',
        'tests/dummy/config/**/*.js',
        'test/**/*.js',
        'lib/**/*.js'
      ],
      excludedFiles: [
        'addon/**',
        'addon-test-support/**',
        'app/**',
        'tests/dummy/app/**'
      ],
      parserOptions: {
        sourceType: 'script',
        ecmaVersion: 2018
      },
      env: {
        browser: false,
        node: true
      },
      extends: ['plugin:node/recommended'],
      rules: {
        // add your custom rules and overrides for node files here
        'no-process-exit': 'off'
      }
    }
  ]
};