webpack4.0 Cannot find module 'webpack/bin/config-yargs'错误解决

 按照https://segmentfault.com/a/1190000012789253教程搭建vue webpack环境,运行npm run dev时报错:

Error: Cannot find module 'webpack/bin/config-yargs'
    at Function.Module._resolveFilename (module.js:538:15)
    at Function.Module._load (module.js:468:25)
    at Module.require (module.js:587:17)
    at require (internal/module.js:11:18)
    at Object. (C:\Users\hboxs022\Desktop\webpack-demo\webpack-demo\node_modules\webpack-dev-server\bin\webpack-dev-server.js:54:1)
    at Module._compile (module.js:643:30)
    at Object.Module._extensions..js (module.js:654:10)
    at Module.load (module.js:556:32)
    at tryModuleLoad (module.js:499:12)
    at Function.Module._load (module.js:491:3)
error Command failed with exit code 1.

解决办法:

webpack版本为4.0,已经安装过webpack-cli.网上找到答案说webpack和webpack-cli要一起安装,如果已经安装过webpack,可以使用如下命令重新安装:

npm add webpack-cli webpack -D

 重新安装后问题解决.