If the above return is not empty, npm config set proxy null or npm config delete proxy, by the way, turn off the https proxy npm config set https-proxy null. If there is a certificate problem, turn off the verification of the certificate npm config set strict-ssl false, of course the above You don’t need to type all the commands. According to the error message, select the corresponding solution, and then try again
If the command 1 is empty, check if there is HTTP_PROXY in your environment variable
Whether the computer has a proxy enabled, causing the certificate to not be trusted by npm. It is recommended that you turn off the proxy and try using Taobao mirror source npm install -g express --registry=https://registry.npm.taobao.org
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
run
npm config get proxySee what you getIf the above return is not empty,
npm config set proxy nullornpm config delete proxy, by the way, turn off the https proxynpm config set https-proxy null. If there is a certificate problem, turn off the verification of the certificatenpm config set strict-ssl false, of course the above You don’t need to type all the commands. According to the error message, select the corresponding solution, and then try againIf the command 1 is empty, check if there is HTTP_PROXY in your environment variable
Have you enabled global proxy?
Whether the computer has a proxy enabled, causing the certificate to not be trusted by npm. It is recommended that you turn off the proxy and try using Taobao mirror source
npm install -g express --registry=https://registry.npm.taobao.orgNetwork problem, it is recommended to use cnpm
Network problems
1. Use Taobao source (cnpm)
2. vpn ss
How did you solve it? I encountered the same problem