Using 'npm install' without Sudo

Npm packages installs should be done without sudo. Infact sudo should be never be used unless tinkering with system wide permissions. Node puts npm packages in a specific folder, usually /usr/local/lib/node_modules. But the trouble is you need sudo permissions to write here. This leads to an endless use of non-requisite sudo permissions. This location is what we need to change and here are handy terminal commands to achieve the same

mkdir ~/.npm
npm config set prefix ~/.npm
nano ~/.bashrc
export PATH="$PATH:$HOME/.npm/bin"
source ~/.bashrc

Complete guide by NPM can be found here :

03 - Fixing npm permissions | npm Documentation

For OsX, this is a well written guide:

https://johnpapa.net/how-to-use-npm-global-without-sudo-on-osx/