.eslintrc.js

const OFF = 0;
const WARN = 1;
const ERROR = 2;

module.exports = {
  root: true,

  env: {
    browser :true,
    es6: true
  },

  parserOptions: {
    parser: 'babel-eslint',
    ecmaVersion: 2018,
    ecmaFeatures: {
      modules: true,
      impliedStrict: true
    },
    sourceType: 'module'
  },

  // https://eslint.vuejs.org/user-guide/
  extends: [
    'standard',
    'plugin:vue/recommended'
  ],

  // Allow some window methods and third-party libraries
  globals: {
    "$": true
  },

  // required to lint *.vue files
  plugins: [
    'vue'
  ],
  // new section below
  rules: {
    semi: false
  }
};