How can I clear the previous ssl proxy setting of NPM? well, I search a lot, but all post I got is mainly about how to set proxy in corporate network.
set
In my case, (windows OS), after put all those commands listed, npm kept taking the proxy in the setting of windows registry
\ HKEY_CURRENT_USER \ Environment
just remove the proxy settings there, after that, I restarted the pc and then "npm install" worked for me
Example