npm ERR! errno ETIMEDOUT
npm ERR! network request to https://registry.npmjs.org/@babel%2fcore failed, reason: connect ETIMEDOUT 104.16.27.35:443
npm ERR! network This is a problem related to network connectivity.
npm ERR! network In most cases you are behind a proxy or have bad network settings.
npm ERR! network
npm ERR! network If you are behind a proxy, please make sure that the
npm ERR! network 'proxy' config is set properly.  See: 'npm help config'

npm ERR! A complete log of this run can be found in:
npm ERR!     C:\Users\ASUS\AppData\Roaming\npm-cache\_logs\2021-08-16T15_50_35_489Z-debug.log

1.输入命令行npm config set proxy null
2. 然后在执行npm install 或 cnpm install