npm install sass sass-loader --save-dev
npm ERR! code ETIMEDOUT
npm ERR! syscall connect
npm ERR! errno ETIMEDOUT
npm ERR! network request to https://registry.npmjs.org/sass-loader failed, reason: connect ETIMEDOUT 104.16.2.35:443
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.
那么得先把 npm 切换淘宝镜像
npm config set registry https://registry.npmmirror.com
保险起见把proxy清除
npm config rm proxy
npm config rm http-proxy
npm config rm https-proxy
