node version management tool nvm hot update tool nodemon

npm init -y initialization package.json 

nodemon xx file or service has updated the action of heat 

NVM simple to use (window version) Download: https://github.com/coreybutler/nvm-windows (download nvm-setup.zip) 

NVM list // View nodejs version list 

nvm install [node version number] // install nodejs 

NVM use [the Node version number] // switch nodejs version