source <(npm completion)
Enables tab-completion in all npm commands.
The synopsis above loads the completions into your current shell. Adding it to your ~/.bashrc or ~/.zshrc will make the completions available everywhere:
npm completion >> ~/.bashrc npm completion >> ~/.zshrc
You may of course also pipe the output of
npm completion to a file
/etc/bash_completion.d/npm if you have a system that will read
that file for you.
COMP_POINT are defined in the
npm completion acts in "plumbing mode", and outputs
completions based on the arguments.