npm ERR! code E407 Proxy Authentication Required

Question

While I am trying to run npm command, I am getting an error.

The error log is reproduced below:

0 info it worked if it ends with ok
1 verbose cli [ \'C:         


        

Answer 1

This error is most likely because you are behind a proxy, or may be you are in your organisation which uses proxy. To find the PROXY name and the PORT you need to do the following steps:
1.go to run
2.type "inetcpl.cpl"
3.Go to Connection tab
4. Go to LAN Setting There you will find address and the port

After you get the "address" and the "port" replace it with "proxy_name" and "port" in the below command and replace "username" with "your username" and "password" with "your password" and run

npm config set proxy http://username:password@proxy_name:port

npm config set http-proxy http://username:password@proxy_name:port

Afterwards run npm.

This should work possibly

Edit: Before running npm config the URL should be encoded and this can be done by just copy pasting the URL to this website https://www.urlencoder.io/