npm star [<pkg>...]
Note: This command is unaware of workspaces.
"Starring" a package means that you have some interest in it. It's
a vaguely positive way to show that you care.
It's a boolean thing. Starring repeatedly has no additional effect.
There's also these extra commands to help you manage your favorite packages:
You can also "unstar" a package using npm unstar
"Unstarring" is the same thing, but in reverse.
You can see all your starred packages using npm stars