.eslintrc.js

module.exports = {
  root: true,
  parserOptions: {
    ecmaVersion: 8,
    ecmaFeatures: {
      jsx: true,
    },
    sourceType: 'module',
  },
  plugins: ['ember', 'react', 'prettier'],
  extends: ['eslint:recommended', 'plugin:ember/recommended', 'prettier'],
  env: {
    es6: true,
    node: true,
    browser: true,
    mocha: true,
  },
  rules: {
    'prettier/prettier': 'warn',

    'react/jsx-uses-react': 'error',

    'react/jsx-uses-vars': 'error',
  },
  overrides: [
    // node files
    {
      files: [
        'index.js',
        'testem.js',
        'ember-cli-build.js',
        'config/**/*.js',
        'tests/dummy/config/**/*.js',
      ],
      excludedFiles: ['app/**', 'addon/**', 'tests/dummy/app/**'],
      parserOptions: {
        sourceType: 'script',
        ecmaVersion: 2015,
      },
      env: {
        browser: false,
        node: true,
      },
      plugins: ['node'],
      rules: Object.assign(
        {},
        require('eslint-plugin-node').configs.recommended.rules,
        {
          // add your custom rules and overrides for node files here
        }
      ),
    },
  ],
};