npm run dev打开项目报错

npm ERR! Windows_NT 10.0.14393

npm ERR! argv "D:\\nodejs\\node.exe" "d:\\nodejs\\node_global\\node_modules\\npm\\bin\\npm-cli.js" "run" "dev"

npm ERR! node v7.4.0

npm ERR! npm v4.1.1

npm ERR! code ELIFECYCLE

npm ERR! vue-loader-demo@1.0.0 dev: `webpack-dev-server --inline --hot --port 8082`

npm ERR! Exit status 1

npm ERR!

npm ERR! Failed at the vue-loader-demo@1.0.0 dev script 'webpack-dev-server --inline --hot --port 8082'.

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 vue-loader-demo package,

npm ERR! not with npm itself.

npm ERR! Tell the author that this fails on your system:

npm ERR! webpack-dev-server --inline --hot --port 8082

npm ERR! You can get information on how to open an issue for this project with:

npm ERR! npm bugs vue-loader-demo

npm ERR! Or if that isn't available, you can get their info via:

npm ERR! npm owner ls vue-loader-demo

npm ERR! There is likely additional logging output above.

出现错误的原因有好几种，我的方法是安装全局依赖cnpm install就可以了