Make actions required property onError ?

[lee-at-zoo-corp]

There has been countless times where me and my colleagues have been bit by XState swallowing errors into the void. It would really help if actions was required on the onError, so at least it signals to developers to assign a function here, such as console.error... I understand this would be API breaking.

Some alternatives are:

• Someone fixes things so errors are bubbled right up to the top
• A lint I suppose

Any other ideas?

[davidkpiano]

Can you show an example where errors have been swallowed "into the void"?

Typically, you can listen for errors via actor.subscribe({ onError: err => … })

[lee-at-zoo-corp]

It's particularly a problem in machines that invoke an actor. If you don't assign an onError with an action explicitly, you'll miss it. It's similar to what you've suggested: you need to be very explicit about catching anything error that's thrown!

[lee-at-zoo-corp]

That's definitely a nice solution though I'll pass along! At least then there are significantly less places to place error-catching code.