As part of our ongoing quest to standardise the rendering systems across Discourse’s codebase, we’re replacing the implementation of the topic-list. Previously, this used a ‘raw handlebars’ (.hbr) approach, and could be customized via template overrides and raw-plugin-outlets. The new implementatio…

[image] Robert: Q: Is it possible to assign complete Component to a Cell, not just a <template>? Yup! Technically, a bare <template> tag is technically creating a “Template Only Component”. Similar to the type of component you get when you drop a bare .hbs file under the components/ directory…

that’s completely awesome! that changes … a lot! :exploding_head:

Dumb question, maybe. But how to apply changes to … mobile topic-list?

For mobile, we have a bunch of new plugin outlets (including wrapper outlets). Or alternatively, you can use a valueTransformer to force the desktop view everywhere (we do this for topic-thumbnails). I’m planning to write a more detailed “how to customize the topic list” Developer Guides next week…

Sorry to eat into your weekend David, yes, just saw the API, thanks app/assets/javascripts/discourse/app/components/topic-list/item.gjs 9f41ce7fc if ( e.key === "Enter" && (e.target.classList.contains("post-activity") || …

Hi, I’ve tried to use value transformer for “topic-list-columns” like this: export default { name: "assignment-topic-list-column-modifier", initialize(container) { const router = container.lookup("service:router"); withPluginApi("1.39.0", (api) => { api.registe…

There is a new guide: [image] Using Transformers to customize client-side values and behaviour Developer Guides Discourse core includes a number of “transformer” hooks which can be used to customize client behaviour. These fall into two categories: Value Transformers ta…

@NateDhaliwal thanks for the info, i will check it.

I think the code should look like: columns.add( "posters-recent", { header: AssignHeaderCell, item: AssignCell } { after: "posters"} }); And you might need to specify a before: {after: "posters", before: "replies"}

@Arkshine thanks a lot, your code works !!! awesome :+1:

Upcoming topic-list changes - how to prepare themes and plugins

Development

david (David Taylor) April 7, 2025, 1:21pm 31

Things are delayed a little bit, but we hope to finish dropping the old code in the next 1-2 weeks

Topic		Replies	Views
MD Topic List component Theme component	73	9583	September 7, 2025
MD Topic List Mobile component Theme component	61	6784	April 7, 2026
Upcoming Header Changes - Preparing Themes and Plugins Development dev-news	38	3973	September 8, 2024
Upgrading Discourse to Ember 4 Development ember	19	3166	December 19, 2024
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Upcoming topic-list changes - how to prepare themes and plugins

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