handleSubmit: throw errors further if you do not define an onError handler

[binarykitchen]

Just started using your library. Turns out it is swallowing errors if you do not define an onError handler.

For example, I have a global error handler attached to window for showing them, and this:

<form ... onSubmit={handleSubmit(onSubmit)}>

There were some HTTP errors happening while submitting, but not shown at all.

Now I've learnt that you have to add an onError handler like this:

onSubmit={handleSubmit(onSubmit, onError)}

... and there you pass on further the error to my function for showing it.

That said, I think, if no onError handler is defined, I think uncaught errors should be thrown further anyway. Swallowing them under magic hooks can be misleading.

What do you think?