Using yargs (npm package), how to give an error if command not found?

Question

I have yargs with 2 commands?

yargs
.command('test-all','',handler)
.command('test-file','',handler)
.argv

The user inputs:

node myapp.js other-command

But yargs don't throw an error. What should I do?

Answer 1

You can use .demandCommand() to do this:

yargs
  .command('test-all','',handler)
  .command('test-file','',handler)
  .demandCommand(1, 'You need at least one command before moving on')
  .argv