Bug 257118

Summary:	CONSOLE JS ERROR ResizeObserver loop completed with undelivered notifications.
Product:	WebKit	Reporter:	Milan Crha <mcrha>
Component:	WebCore Misc.	Assignee:	Nobody <webkit-unassigned>
Status:	RESOLVED INVALID
Severity:	Normal	CC:	bugs-noreply, heycam, mcatanzaro, simon.fraser, webkit-bug-importer
Priority:	P2	Keywords:	InRadar
Version:	Other
Hardware:	Unspecified
OS:	Unspecified

Description Milan Crha 2023-05-22 02:51:11 PDT

Is there a way to disable "CONSOLE JS ERROR ResizeObserver loop completed with undelivered notifications.", please?

I understood from the ResizeObserver documentation that it's expected to not have delivered all the notifications, especially when changing size of the elements inside the callback, thus the error itself is kinda meaningless and only fills the console with no gain.

This is with webkit2gtk4.1-2.40.1

Comment 1 Radar WebKit Bug Importer 2023-05-29 02:52:16 PDT

<rdar://problem/109967135>

Comment 2 Milan Crha 2023-06-22 22:20:32 PDT

For the record, the warning can be useful for developers, but not useful at all for the users. In my case, I made some changes to avoid it, thus I get and process all the notifications in the code now.

Comment 3 Michael Catanzaro 2023-06-23 06:06:19 PDT

Well it's not expected that users would ever notice console JS errors. You have to open the web inspector to see these, or deliberately hook into WebKitConsoleMessage to do something else with them. All console messages are intended for developers.

Comment 4 Milan Crha 2023-06-25 23:40:40 PDT

You are right. Evolution enables webkit_settings_set_enable_write_console_messages_to_stdout() only when WebKit developer option is enabled in the settings.

Err, re-reading the ResizeObserver documentation [1] I see I'm wrong, the WebKitGTK does precisely what the documentation says. I'm sorry for the noise.

[1] https://developer.mozilla.org/en-US/docs/Web/API/ResizeObserver#observation_errors