1868383 - Changing network to offline in debugger tools does not trigger online/offline event listeners

Status: NEW

(DevTools :: DOM, defect, P2)

Description

[dargis.jokubas583]

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:120.0) Gecko/20100101 Firefox/120.0

Steps to reproduce:

simplified version to reproduce:

paste this into debugger console:
window.addEventListener('offline', () => {console.log('offline')})

change Network status from "No Throttling" to "Offline"

Actual results:

Event "offline" is is not triggered, "offline" is not logged to console.

Note: it does work, when manually turning off internet connection (manually turning off wifi, plugging out ethernet cable, etc.)

Expected results:

Event "offline" should trigger, and "offline" should be logged to console

Comment 1

[BugBot [:suhaib / :marco/ :calixte]]

The Bugbug bot thinks this bug should belong to the 'DevTools::Debugger' component, and is moving the bug to that component. Please correct in case you think the bot is wrong.

Comment 2

[Hubert Boma Manilla (:bomsy)]

Thanks for reporting.

I think this was fixed in Bug 1855129 which landed in Firefox 121.

Could you update and test again?

Comment 3

[dargis.jokubas583]

Retested using 121.0b7 on this machine and another Windows machine - the behavior did not change

Comment 4

[Hubert Boma Manilla (:bomsy)]

Ah yeah .. i can confirm that. Looks like the fixes missed that.

Thanks for filing.

Comment 5

[Hubert Boma Manilla (:bomsy)]

Attachment: WIP: Bug 1868383 - Dispatch the offline/online events when toggling offline throttling modes in the netmonitor