Setup Eslint + Prettier in an existing vue-cli project- eslintrc file- user settings in VsCode- package.json (for check versions)

.eslintrc

// Eslint + Prettier, custom configuration taken from here.
// https://medium.com/@doppelmutzi/eslint-prettier-vue-workflow-46a3cf54332f
// and here's my gist
// https://gist.github.com/robertoandres24/6cb6d0fa898bfb31066c5e1b118df64a
module.exports = {
  root: true,
  parserOptions: {
    parser: 'babel-eslint'
  },
  env: {
    browser: true
  },
  extends: [
    "prettier",
    "prettier/standard",
    "plugin:vue/recommended"
  ],
  plugins: [
    'vue', 'prettier'
  ],
  rules: {
    "prettier/prettier": "error",
    "vue/max-attributes-per-line": 0
  }
}

package

{
  ...
  ...
  "scripts": {
    "dev": "webpack-dev-server --inline --progress --config build/webpack.dev.conf.js",
    "start": "npm run dev",
    "lint": "eslint --ext .js,.vue src",
    "lint-autofix": "eslint --ext .js,.vue src test --fix",
    "eslint-check": "eslint --print-config .eslintrc.js | eslint-config-prettier-check",
    "build": "node build/build.js"
  },
  "dependencies": {
    ...
    ...
  },
  "devDependencies": {
    "autoprefixer": "^7.1.2",
    "babel-core": "^6.22.1",
    "babel-eslint": "^8.2.1",
    "babel-helper-vue-jsx-merge-props": "^2.0.3",
    "babel-loader": "^7.1.1",
    "babel-plugin-syntax-jsx": "^6.18.0",
    "babel-plugin-transform-runtime": "^6.22.0",
    "babel-plugin-transform-vue-jsx": "^3.5.0",
    "babel-preset-env": "^1.3.2",
    "babel-preset-stage-2": "^6.22.0",
    "browser-sync": "^2.24.4",
    "browser-sync-webpack-plugin": "^2.2.2",
    "chalk": "^2.0.1",
    "copy-webpack-plugin": "^4.0.1",
    "css-loader": "^0.28.0",
    "eslint": "^4.15.0",
    "eslint-config-prettier": "^3.1.0",
    "eslint-config-standard": "^10.2.1",
    "eslint-friendly-formatter": "^3.0.0",
    "eslint-loader": "^1.7.1",
    "eslint-plugin-import": "^2.7.0",
    "eslint-plugin-node": "^5.2.0",
    "eslint-plugin-prettier": "^3.0.0",
    "eslint-plugin-promise": "^3.4.0",
    "eslint-plugin-standard": "^3.0.1",
    "eslint-plugin-vue": "^4.0.0",
    "extract-text-webpack-plugin": "^3.0.0",
    "file-loader": "^1.1.4",
    "friendly-errors-webpack-plugin": "^1.6.1",
    "html-webpack-plugin": "^2.30.1",
    "node-notifier": "^5.1.2",
    "node-sass": "^4.9.3",
    "optimize-css-assets-webpack-plugin": "^3.2.0",
    "ora": "^1.2.0",
    "portfinder": "^1.0.13",
    "postcss-import": "^11.0.0",
    "postcss-loader": "^2.0.8",
    "postcss-url": "^7.2.1",
    "prettier": "^1.14.3",
    "rimraf": "^2.6.0",
    "sass-loader": "^7.0.1",
    "sass-resources-loader": "^1.3.3",
    "semver": "^5.3.0",
    "shelljs": "^0.7.6",
    "uglifyjs-webpack-plugin": "^1.1.1",
    "url-loader": "^0.5.8",
    "vue-loader": "^13.3.0",
    "vue-style-loader": "^3.0.1",
    "vue-template-compiler": "^2.5.2",
    "webpack": "^3.6.0",
    "webpack-bundle-analyzer": "^2.9.0",
    "webpack-dev-server": "^2.9.1",
    "webpack-merge": "^4.1.0"
  },
  "engines": {
    "node": ">= 6.0.0",
    "npm": ">= 3.0.0"
  },
  "browserslist": [
    "> 1%",
    "last 2 versions",
    "not ie <= 8"
  ]
}

settings

{
 ...
 ...
  "eslint.enable": true,
  "editor.formatOnSave": true,
  "eslint.autoFixOnSave": true,
  "eslint.alwaysShowStatus": true,
  "eslint.validate": [
    "javascript",
    "vue"
  ],
  "vetur.format.defaultFormatter.html": "prettier"
}