Error handling with Asynquence is a bit different. By default a error in the sequence suspends the entire sequence.

1. error_behavior_in asynquence.js

ASQ()
.promise(delayWithReject(200))
.or(() => console.log('caught'))
.val(() => console.log('The sequence deactivates. So this never gets logged.'))

ASQ()
// a `try` always ends up in a sequence progress
// in case the task fails the next step will receive a special messsage
// -> {error: "Reason for failure" }
.try((done) => done.fail('Doomed!!'))
.or(() => console.log('caught'))
.val((message) => console.log('The sequence would proceed either way', message))

2. error_behavior_in_promise_chain.js

var ASQ = require('asynquence-contrib')


const delay = (ms) => new Promise((resolve) => setTimeout(resolve, ms))
const delayWithReject = (ms) => new Promise((resolve, reject) => setTimeout(reject, ms))

delayWithReject(200)
.catch(() => console.error('caught'))
.then(() => delay(200))
.then(() => console.log('The chain is restored'))

// unhandled error does not restore the chain
delayWithReject(400)
.then(() => delay(200))
.then(() => console.log('The chain never gets restored'))

3. all_errors_fired_in_a_sequence.js

const delay = (ms) => new Promise((resolve) => setTimeout(resolve, ms))
const delayWithReject = (ms) => new Promise((resolve, reject) => setTimeout(reject, ms))

ASQ()
  .promise(delay(200))
  .val(() => {console.log('boom')})
  .or(() => {console.error('bam')}) // this gets logged
  .promise(delayWithReject(400))
   // my expected behavior is to see just this get logged
  .or(() => console.error('caught')) // this also gets logged