- From: johnjbarton <johnjbarton@chromium.org>
- Date: Fri, 31 May 2013 13:28:50 -0700
- To: www-dom@w3.org
- Message-ID: <CA+2jLuJmuzhYgj9xr1ksi1iaM+cgS0AEsDkk-pzFYSD6juskmA@mail.gmail.com>
When JS calls EventTarget dispatchEvent(evt), EventListener-s are called. If those EventListeners throw exceptions, what should happen if the closest enclosing try/catch block surrounds the dispatchEvent() call? Both Chrome and Firefox currently ignore the try/catch block and report that the exception is "uncaught". In Chrome, this EventListener is invoked within an internal try/catch (V8::TryCatch) and any exceptions that result are reported as uncaught before returning to the caller (eventually returning to the caller of dispatchEvent()). I could not find any mention in http://www.w3.org/TR/DOM-Level-2-Events/events.html of the expected result. I was surprised by the behavior in Chrome and reported: https://code.google.com/p/chromium/issues/detail?id=239648 The little test case is online: http://johnjbarton.github.io/webdev-examples/239648_TryCatchFails/uncaughtErrors.html Thanks, jjb
Received on Sunday, 2 June 2013 17:20:44 UTC