Example for handling unhandled rejected promises

unhandled-rejected-output.txt

Unhandled Rejection
Reason:
Error
    at funcC (/Users/everettcaleb/Desktop/test.js:11:9)
    at funcB (/Users/everettcaleb/Desktop/test.js:7:9)
    at funcA (/Users/everettcaleb/Desktop/test.js:3:9)
    at main (/Users/everettcaleb/Desktop/test.js:23:3)
    at Object.<anonymous> (/Users/everettcaleb/Desktop/test.js:24:3)
    at Module._compile (internal/modules/cjs/loader.js:688:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:699:10)
    at Module.load (internal/modules/cjs/loader.js:598:32)
    at tryModuleLoad (internal/modules/cjs/loader.js:537:12)
    at Function.Module._load (internal/modules/cjs/loader.js:529:3)
Promise:
Promise {
  <rejected> Error
      at funcC (/Users/everettcaleb/Desktop/test.js:11:9)
      at funcB (/Users/everettcaleb/Desktop/test.js:7:9)
      at funcA (/Users/everettcaleb/Desktop/test.js:3:9)
      at main (/Users/everettcaleb/Desktop/test.js:23:3)
      at Object.<anonymous> (/Users/everettcaleb/Desktop/test.js:24:3)
      at Module._compile (internal/modules/cjs/loader.js:688:30)
      at Object.Module._extensions..js (internal/modules/cjs/loader.js:699:10)
      at Module.load (internal/modules/cjs/loader.js:598:32)
      at tryModuleLoad (internal/modules/cjs/loader.js:537:12)
      at Function.Module._load (internal/modules/cjs/loader.js:529:3) }

unhandled-rejected.js

async function funcA() {
  await funcB()
}

async function funcB() {
  await funcC()
}

async function funcC() {
  throw new Error()
}

(function main() {
  process.on('unhandledRejection', (err, promise) => {
    console.error('Unhandled Rejection')
    console.error('Error:')
    console.error(err)
    console.error('Promise:')
    console.error(promise)
  });

  funcA()
})()