nodejs_throwing.js

const throwing = () => {
 throw Error('eee')
}

const throwingAsync = async () => {
 throw Error('eee')
}

const rejectingButNotReturning = () => {
  return Promise.reject(Error('aaa'))
}

const rejectingButNotReturningAsync = async () => {
 Promise.reject(Error('aaa'))
}

const rejectingAndReturning = async () => {
 return Promise.reject(Error('aaa'))
}


(function(){
  const args = process.argv
  const availableFunctions = [
    'throwing',
    'throwingAsync',
    'rejectingButNotReturning',
    'rejectingButNotReturningAsync',
    'rejectingAndReturning'
  ]

  if(!args[2]) {
    return console.log(`Choose a function. Available ones are: ${availableFunctions.join(' ')}`)
  }

  switch(args[2]) {
    case 'throwing':
      return throwing()
    case 'throwingAsync':
      return throwingAsync()
    case 'rejectingAndReturning':
      return rejectingAndReturning().catch(console.log)
    case 'rejectingButNotReturningAsync':
      return rejectingButNotReturningAsync().catch(console.log)
    case 'rejectingButNotReturning':
      return rejectingButNotReturning()
  }
})()