npm install -g versus local

Question

I clone a git repo to my local, and run npm install , it worked. What's the different running npm install vs npm install -g ? Why would I need to run npm install -g to a repo? unless it's a tool for example nodemon I would like to install globally because I want to use them everywhere.

Answer 1

npm install -g NAME它会全局安装，但如果要使用它，则应在项目所在的文件夹中使用npm link NAME 。