Why npm install -g @angular/cli?

Question

I know there are lot many question regarding this npm package installing but I couldn't find the exact relevant answer, I have already installed npm and also developed few applications in my VStudio, Every time before developing the new project of angular do we need to install npm again by typing this in cmd "npm install -g @angular/cli?

Answer 1

Once you have installed @angular/cli globally, in the next project you just need run ng new app-name. This command will create a folder named 'app-name', than will install all dependencies locally - including @angular/cli.

Installing @angular/cli globally allow you to use 'ng' command everywhere. It's required to install locally because to your project, some specific @angular/cli version is required and newer versions maybe brake.

If your @angular/cli global is newer than the local project version, 'ng' will use the local @angular/cli instead, when you run 'ng serve', for example.

Resume: after installed using npm install -g @angular/cli, you will need just to run ng new app-name.

Answer 2

No. You only need to run

npm i -g @angular/cli 

Once ever (or when you update in the future)

And that's used to generate angular apps and different angular cli-related terminal commands. You don't need to run it ever again after that. But you will need to install it locally in your project so that certain things will work propertly