Error code

npm EUSAGE

NPMEUSAGE
Runtime Error Code· An error code from a programming runtime or package manager, like Node.js or npm.

What it means

An npm command was invoked with invalid arguments or an unrecognized combination of flags.

How to fix it

  1. Run npm help <command> for usage information.
  2. Check the command spelling and flag names.
  3. Ensure arguments are in the correct order for the command.

Not affiliated with npm. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.