'webpack-dev-server'未被识别为内部或外部命令、可操作程序或批处理文件？

Question

E:MyProjectsMyMLMLayer1.UI>npm start 
mymlm@1.0.0 start E:MyProjectsMyMLMLayer1.UI
webpack-dev-server --no-inline --progress --port 9090
'webpack-dev-server' is not recognized as an internal or external command,
operable program or batch file.
npm ERR! Windows_NT 10.0.15063
npm ERR! argv "C:\Program Files\nodejs\node.exe" "C:\Program Files\nodejs\node_modules\npm\bin\npm-cli.js" "start"
npm ERR! node v6.11.3
npm ERR! npm  v3.10.10
npm ERR! code ELIFECYCLE
npm ERR! mymlm@1.0.0 start: `webpack-dev-server --no-inline --progress --port 9090`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the mymlm@1.0.0 start script 'webpack-dev-server --no-inline --progress --port 9090'.
npm ERR! Make sure you have the latest version of node.js and npm installed.
npm ERR! If you do, this is most likely a problem with the mymlm package,
npm ERR! not with npm itself.
npm ERR! Tell the author that this fails on your system:
npm ERR!     webpack-dev-server --no-inline --progress --port 9090
npm ERR! You can get information on how to open an issue for this project with:
npm ERR!     npm bugs mymlm
npm ERR! Or if that isn't available, you can get their info via:
npm ERR!     npm owner ls mymlm
npm ERR! There is likely additional logging output above.
npm ERR! Please include the following file with any support request:
npm ERR!     E:MyProjectsMyMLMLayer1.UInpm-debug.log

如何解决这个问题？我尝试了Stack Overflow中的许多答案，但仍然遇到同样的问题。

注意：我有Windows-10 Home，Node-V6.11.3，NPM-3.10.10。

Answer 1

在package.json文件中定义脚本部分：

"scripts": {
"start": "node_modules/.bin/webpack --config webpack.js --watch",
...
  },

Answer 2

添加webpack-dev-server全球

npm i -g webpack-dev-server