Class attribute not cleared when re-using elements from cache pool

[steelbrain]

I am hitting a very weird and difficult to reproduce bug. It would be nice to have a Slack, Gitter or IRC channel for preact where I can collaborate with the community to repro it.

The bug I'm hitting is with Message Component of linter-ui-default.
It should, according to the code produce messages like this, and it does

but after a few dozen render triggers, it becomes this

Nothing on our component side changes, I believe the bug to be on preact's side

Update

After an hour trying to repro, I found out that it's using the span elements from linter-eslint that it had recycled, and it's passing the same without clearing their class attribute

[developit]

Hi @steelbrain - there is a gitter room, gitter.im/developit/preact

I suspect this may be related to the manual Element insertion via appendChild - this ends up getting recollected by preact's recycled, but it does not have any props associated because it was not created by preact. I can look into supporting that though, otherwise preact really shouldn't be recollecting an Element it didn't create.

[steelbrain]

Please note that the examples demonstrated don't use appendChild, its support exists but it isn't used

[developit]

Fix released in 4.4.

[steelbrain]

Beautiful, thanks again! 👍

[StoneCypher]

@developit - gitter.im/developit/preact doesn't seem to exist. is there a replacement?

[StoneCypher]

nevermind, found it

the new chat is at preact.slack.com

you must sign up from https://preact-slack.now.sh instead