problem description

I have been looking for it for a long time on the Internet, saying that it is the problem of ssl certificate.
according to the following widely circulated method, it still doesn"t work

the platform version of the problem and what methods you have tried

on February 27th, 2014, npm no longer supports self-signed certificates.

because npm install follows the https protocol, it needs to be guaranteed by digital certificate

solution 1:

cancel ssl verification: npm config set strict-ssl false

if it is not successful, replace the npm source with a domestic image:
npm config set registry
npm config set registry http://registry.npm.taobao.org/

solution 2:

upgrade: npm install npm-g-- ca=null
or npm config set ca= "

recommended method 1

in the way @ tries to learn to smile ,
executes require ("https"). GlobalAgent.options.ca = require (" ssl-root-cas/latest"). Create ();
) on node