npm start无法运行

Question

为什么重新启动MacBook时npm start无法运行？我之前必须运行任何代码吗？请帮忙。

这是我每次尝试都会得到的结果。...

Debugger attached.
npm ERR! code ENOENT
npm ERR! syscall open
npm ERR! path /Users/somprey/Desktop/demo/package.json
npm ERR! errno -2
npm ERR! enoent ENOENT: no such file or directory, open '/Users/somprey/Desktop/demo/package.json'
npm ERR! enoent This is related to npm not being able to find a file.
npm ERR! enoent 

npm ERR! A complete log of this run can be found in:
npm ERR!     /Users/somprey/.npm/_logs/2020-10-11T03_08_40_658Z-debug.log
Waiting for the debugger to disconnect...
SYLVESTERs-MBP:demo somprey$ 

screenshot

Answer 1

npm start触发package.json中的启动脚本。根据错误消息，您的文件夹不包含package.json文件。

Answer 2

从错误日志中可以明显看出，该文件夹不包含package.json。确保您正在从包含package.json的文件夹中运行脚本npm run。