$ npm start

> react-dianping-webpack@1.0.0 start F:\react-dianping-getready-perf-todolist

> set NODE_ENV=dev && webpack-dev-server --progress --colors

module.js:549

    throw err;

    ^

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

    at Function.Module._resolveFilename (module.js:547:15)

    at Function.Module._load (module.js:474:25)

    at Module.require (module.js:596:17)

    at require (internal/module.js:11:18)

    at Object.<anonymous> (F:\react-dianping-getready-perf-todolist\node_modules\webpack-dev-server\bin\webpack-dev-server.js:64:1)

    at Module._compile (module.js:652:30)

    at Object.Module._extensions..js (module.js:663:10)

    at Module.load (module.js:565:32)

    at tryModuleLoad (module.js:505:12)

    at Function.Module._load (module.js:497:3)

npm ERR! code ELIFECYCLE

npm ERR! errno 1

npm ERR! react-dianping-webpack@1.0.0 start: `set NODE_ENV=dev && webpack-dev-server --progress --colors`

npm ERR! Exit status 1

npm ERR!

npm ERR! Failed at the react-dianping-webpack@1.0.0 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:

npm ERR!     C:\Users\admin\AppData\Roaming\npm-cache\_logs\2018-08-02T06_12_06_089Z-debug.log