How to handle subcommands?

[surreal burrow]

• What's your exact discord.js npm list discord.js and node node -v version?
• Post the full error stack trace, not just the top part!
• Show your code!
• Explain what exactly your issue is.
• Not a discord.js issue? Check out #useful-servers.

[cunning vigil]

like how do I make a switch based on which subcommand is used?