When the [Original willing Li] npm run dev parabolic 'cross-env' is not recognized as an internal or external command solution of

By Vue init webpack-simple to create a project, throwing the following error when you run npm run dev,

 cross-env NODE_ENV=development webpack-dev-server --open --hot

'cross-env' is not recognized as an internal or external command,
operable program or batch file.
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! [email protected] dev: `cross-env NODE_ENV=development webpack-dev-server --open --hot`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the [email protected] 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\Aerchi\AppData\Roaming\npm-cache\_logs\2020-03-24T18_46_51_349Z-debug.log

解决方法： 

webpack packing error, because the windows do not support cross-env, you can install the module:

npm install -g  cross-env
或
cnpm install -g  cross-env
--------------------------------
First, run:

rm -rf node_modules
rm package-lock.json yarn.lock
npm cache clear --force

Then run the command

npm install cross-env

npm install 

and then you can also run

npm run dev