.eslintrc.js

module.exports = {
  env: {
    browser: true,
    commonjs: true,
    es6: true
  },
  // extends: "eslint:recommended",
  parserOptions: {
    sourceType: 'module'
  },
  rules: {
    indent: ['error', 2],
    'linebreak-style': ['error', 'unix'],
    quotes: ['error', 'single'],
    semi: ['error', 'never'],
    'comma-dangle': ['error', 'always-multiline']
  }
}