出现的问题： The CLI moved into a separate package: webpack-cli Please install 'webpack-cli' in addition to webpack itself to use the CLI -> When using npm: npm i -D webpack-cli -> When using yarn: yarn add -D webpack-cli module.js:491 throw err; ^
Error: Cannot find module 'webpack-cli/bin/config-yargs' at Function.Module._resolveFilename (module.js:489:15) at Function.Module._load (module.js:439:25) at Module.require (module.js:517:17) at require (internal/module.js:11:18) at Object.<anonymous> (E:\webpack_vue\node_modules\webpack-dev-server\bin\webpack-dev-server.js:87:1) at Module._compile (module.js:573:30) at Object.Module._extensions..js (module.js:584:10) at Module.load (module.js:507:32) at tryModuleLoad (module.js:470:12) at Function.Module._load (module.js:462:3)
**** 原因：**** 需要安装webpack-cli
**** 解决方案：**** $ npm install webpack-cli --save-dev
