PS D:\my\work\practiceDemo\vue-ssr-tech> npm run dev

> vue-ssr-tech@1.0.0 dev D:\my\work\practiceDemo\vue-ssr-tech

> cross-env NODE_ENV=development webpack-dev-server --config webpack.config.js

internal/modules/cjs/loader.js:968

  throw err;

  ^

Error: Cannot find module 'webpack/bin/config-yargs'

Require stack:

- D:\my\work\practiceDemo\vue-ssr-tech\node_modules\webpack-dev-server\bin\webpack-dev-server.js

    at Function.Module._resolveFilename (internal/modules/cjs/loader.js:965:15)

    at Function.Module._load (internal/modules/cjs/loader.js:841:27)

    at Module.require (internal/modules/cjs/loader.js:1025:19)

    at require (internal/modules/cjs/helpers.js:72:18)

    at Object.<anonymous> (D:\my\work\practiceDemo\vue-ssr-tech\node_modules\webpack-dev-server\bin\webpack-dev-server.js:54:1)

    at Module._compile (internal/modules/cjs/loader.js:1137:30)

    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1157:10)

    at Module.load (internal/modules/cjs/loader.js:985:32)

    at Function.Module._load (internal/modules/cjs/loader.js:878:14)

    at Function.executeUserEntryPoint [as runMain] (internal/modules/run_main.js:71:12) {

  code: 'MODULE_NOT_FOUND',

  requireStack: [

    'D:\\my\\work\\practiceDemo\\vue-ssr-tech\\node_modules\\webpack-dev-server\\bin\\webpack-dev-server.js'

  ]

}

npm ERR! code ELIFECYCLE

npm ERR! errno 1

npm ERR! vue-ssr-tech@1.0.0 dev: `cross-env NODE_ENV=development webpack-dev-server --config webpack.config.js`

npm ERR! Exit status 1

npm ERR!

npm ERR! Failed at the vue-ssr-tech@1.0.0 dev 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:

npm ERR!     C:\Users\lingyun\AppData\Roaming\npm-cache\_logs\2020-10-27T08_59_13_905Z-debug.log