Run 'node process.js' in the same folder/directory that the file lives.

process.js

process.on('exit', code => {
  console.log(`About to exit with code: ${code}`)
})

process.on('uncaughtException', err => {
  console.error(err)
  
  // comment line 9 out, then run the command in the
  // description. Then comment it back in. and run that same command from
  // the description again.
  process.exit(1)
})

process.stdin.resume()

console.dog()