nodemon : The term 'nodemon' is not recognized as the name of a cmdlet, function, script file, or operable program.
Check the spelling of the name, or if a path was included, verify that the path is correct and try again.
At line:1 char:1
+ nodemon ap.js
+ ~~~~~~~
+ CategoryInfo : ObjectNotFound: (nodemon:String) [], CommandNotFoundException
+ FullyQualifiedErrorId : CommandNotFoundException
将nodemon安装为全局包
npm install -g nodemon