Darn it, I forgot they bubble. Thank you for the detailed explanation.
> On Feb 6, 2015, at 1:59 AM, Joshua Bell <jsb...@google.com> wrote:
>
> On Thu, Feb 5, 2015 at 12:58 PM, Glen Huang <curvedm...@gmail.com
> <mailto:curvedm...@gmail.com>> wrote:
> The IDBTransaction interface exposes an onerror event handler. I wonder when
> that handler gets called? The algorithm of "Steps for aborting a transaction”
> dispatches error events at requests of the transaction, but never at the
> transaction itself, only an abort event is dispatched, if I understand the
> spec correctly.
>
> If that is true, why exposing the onerror event handler on the IDBTransaction
> interface?
>
>
> In the steps 3.3.12 Fire an error event, "The event bubbles and is
> cancelable. The propagation path for the event is the transaction's
> connection, then transaction and finally request." Which is to say: if
> cancelBubble() is not called, the event will bubble from the request to the
> transaction to the connection.
>
> A common use case is to attach an error handler on the transaction or
> database connection to e.g. log errors back to the server, rather than having
> to attach such a handler to every request.
>
