please refer the below link. it will give you most of the information. https://www.html5rocks.com/en/tutorials/internals/howbrowserswork/
two approaches to be follow. npm config set proxy 10.125.155.11:8080 npm config set https-proxy 10.125.155.11:8080 npm config set registry "http://registry.npmjs.org/" (http://registry.npmjs.org/%27) ====================================================================== npm config set proxy http://10.125.155.11:8080/ npm config set https-proxy http://10.125.155.11:8080/ npm config set registry "https://registry.npmjs.org/"
W3 schools provide most important web based functionalities please see the below link https://www.w3schools.com/howto