vue 專案報錯大全（一） vue報錯：無法啟動伺服器，報錯（npm run dev 報錯問題） #出錯背景 自己搭建的vue框架，在搭建好一個專案時忽然報錯（在此之前其他專案正常執行中，搭建了新的專案啟動服務時啟動不了了。 #報錯程式碼 Invalid configuration object. webpack-dev-server has been initialised using a configuration object that does not match the API schema.

• configuration.before should be an instance of function Exposes the Express server to add custom middleware or routes before webpack-dev-middleware will be added… npm ERR! code ELIFECYCLE npm ERR! errno 1 npm ERR!
  [email protected] start: webpack-dev-server --config config/webpack.dev.js npm ERR! Exit status 1 npm ERR! npm ERR! Failed at the [email protected] start script. npm ERR! This is probably not a problem with npm. There is likely additional logging output above. npm ERR! A complete log of this run can be found in: #解決方案
  * 通過查詢發現是因為還沒有編寫mock檔案裡的內容（好低階的錯誤。。）