PS D:\VSCODE\express-demo> npm run dev//跟著視頻的步驟報(bào)錯(cuò)

npm ERR! missing script: dev

npm ERR! A complete log of this run can be found in:

npm ERR!? ? ?D:\nodejs\node_cache\_logs\2021-04-13T06_09_30_179Z-debug.log

PS D:\VSCODE\express-demo> npm start//使用之前的啟動(dòng)方法報(bào)錯(cuò)

> express-demo@1.0.0 start D:\VSCODE\express-demo

> nodemon ./src/app.js

'nodemon' 不是內(nèi)部或外部命令，也不是可運(yùn)行的程序

或批處理文件。

npm ERR! code ELIFECYCLE

npm ERR! errno 1

npm ERR! express-demo@1.0.0 start: `nodemon ./src/app.js`

npm ERR! Exit status 1

npm ERR!

npm ERR! Failed at the express-demo@1.0.0 start 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!? ? ?D:\nodejs\node_cache\_logs\2021-04-13T06_09_39_374Z-debug.log