.eslintrc.js

module.exports = {
  env: {
    browser: true,
    es6: true,
  },
  parser: 'babel-eslint',
  parserOptions: {
    ecmaVersion: 2018,
    sourceType: 'module',
  },
  plugins: ['prettier'],
  rules: {
    'prettier/prettier': 'error',
    'no-unused-vars': ['error', {ignoreRestSiblings: true}],
  },
};