996754 - User-terminated apps do not receive 'beforeunload' event

Status: RESOLVED WONTFIX

(Firefox OS Graveyard :: Runtime, defect)

Description

[Potch [:potch]]

Expected behavior:

1) user closes app from app switcher (with x or swiping up)
2) app recieves 'beforeunload' event

Observed that beforeunload is not triggered.

Comment 1

[Oleg Zasypkin [:azasypkin]]

Hey Alive,

Maybe you can help here or point to the right direction?

In Messages app we're planning to do some cleanup (namely closing MessagePort for SharedWorker or BroadcastingChannel - when it's implemented) on "window.beforeunload\unload"... But seems that "beforeunload" doesn't work at all + "unload" isn't always fired if I close app through Task Manager. 

By "doesn't work" I mean that I don't see any logs from "console.log" (I put some to beforeunload\unload handlers) in logcat.

Thanks!

Comment 2

[(inactive after 6/18) Alive Kuo [:alive]]

This is a feature our gecko doesn't support, or you could call it a bug, please ask help from platform folks.

Comment 3

[Harry]

It looks like this bug is the reason I got no answers to http://stackoverflow.com/questions/26475769/what-api-events-are-triggered-when-closing-a-firefoxos-app/26790185#26790185

I strongly think that FxOS should support a beforeunload event, or implement some other way of detecting user close and giving the option to save essential data before closing.

Comment 4

[Harry]

Seeing Bug 910995 - [Camera] Video file is not properly closed when phone is restarted while recording -- I think it is also important that apps get a beforeunload event if the phone is to be powered off (or if the app is to be unloaded for any other reason). Does that need logging as a new bug, or is it sufficient to note the requirement here?

Comment 5

[BMO Automation]

Firefox OS is not being worked on