Disclaimer: very happy with the direction here and thanks for all the work so far as there’s a lot of power in the new system. Just need to make sure we keep some equivalent capabilities? … [תמונה] Upcoming topic-list changes - how to prepare themes and plugins :sos: What about other customizat…

[תמונה] Robert: would it be possible to hook into Glimmer events such as didInsert, didUpdate, willDestroy via the new API? We could introduce specific transformers in certain places. But I don’t see us adding a general API which would allow you to attach to any element/component. As for the…

[תמונה] Robert: which I understand is a deprecated method. Is it? :confused: It’s not just require to update to the native class syntax? [תמונה] Using modifyClass to change core behavior Developer Guides For advanced themes and plugins, Discourse offers …

[תמונה] Upcoming topic-list changes - how to prepare themes and plugins Upgrades will also be required if you use modifyClass on component:topic-list or component:topic-list-item. If your site has any of these incompatible customizations, I’m going by this

Oh, I see. I thought that meant this upgrade. [תמונה] Don: It’s not just require to update to the native class syntax?

It would be good to get clarity. So is modifyClass still valid? (Just updated syntax - might be good if so to reference that guide) Can I still use that to access the style attribute of the enclosing tag? Classic Components are different in that they historically provided access to enclosing tag…

Ah, you’re right. There is a deprecated notice in console. Deprecation notice: Modifying ‘component:topic-list-item’ with ‘modifyClass’ is deprecated. Use the value transformer ‘topic-list-columns’ and other new topic-list plugin APIs instead.

modifyClass itself is not deprecated. It’s a risky customization method, and you should take precautions when using it (as described in the doc @don linked), but we don’t have any imminent plans to remove it. The reason we’re printing a deprecation message for component:topic-list and component:top…

Thanks for considering this David, that would be great!

David, I have another one, would it be possible to hook into Glimmer events such as didInsert, didUpdate, willDestroy via the new API? I want to run some additional javascript on didInsert, for example, which is currently handled by @on and modifyClass. javascripts/discourse/initializers/p…

[תמונה] David Taylor: We could introduce specific transformers in certain places. But I don’t see us adding a general API which would allow you to attach to any element/component. Thanks. So far so good with your current technique, I’ve tailored it for TLP and it appears to function well. I’…

Works like a charm, thanks again! :rocket:

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merefield (Robert) 10 בינואר,‏ 2025,‏ 6:54am 3

I’m going by this

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Using modifyClass to change core behavior Developer Guides	6	2334	4 במרץ,‏ 2026
Upcoming topic-list changes - how to prepare themes and plugins Development dev-news	35	1769	14 באפריל,‏ 2025
Modernizing our Topic List HTML - preparing themes, components and plugins Announcements new-feature	9	1717	3 בפברואר,‏ 2025
Modify Ember model class using Theme Component Development	1	727	28 באוקטובר,‏ 2020
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