We want to update the Ember version used in Discourse. Right now, we’re on 3.15, and we’d like to get to 4.1 We’ve set a goal to finish this work by the end of this year. Please note that this topic is a roadmap, and all the plans and estimates are tentative. This topic is not intended to house an…

[image] Joe: String prototype extensions :link: - until: 4.0.0 - size-m Core: All have been :white_check_mark: DEV: Remove ‘underscore’ string prototype extensions DEV: Remove ‘decamelize’ string prototype extensions DEV: Remove ‘dasherize’ string prototype extensions DEV: Remove ‘classify’…

@Johani perhaps not something blocking Ember 4 directly, but mixins might be worth considering on the roadmap as well: In addition, some new framework classes, such as Glimmer components, do not support Ember mixins at all. In the future, mixins will be removed from the framework, and will not be …

Do we have a feel for when the Topic Lists will move to Glimmer Components and dump raw templates?

Tentatively hoping to get to it in the next 3-6 months, but that’s not set in stone. Right now the primary focus for our “modernising JS” team is getting Discourse onto Ember 4.x+ (3.28 is now EOL).

Hi @david , Out of interest, what would be your recommendation on a theming side of things. We’re investigating undergoing a significant retheme of Discourse (simplifications, make it more “social media like”, less developer focused, use posts with comments instead of threads). Given the amount of …

Hi Simon, it’s difficult to give a definitive answer here given the uncertainty on the timeline. At CDCK we are still developing new themes for customers against the existing version of core. Any big changes (e.g. a rewrite of the topic list) will be opt-in initially, so you’ll have time to adapt t…

Thanks @david , that is helpful. Cheers, Simon

How are we going to deal with model modification given Octanes Glimmer and “data-down, actions up” approach? We have a challenge with Plugin outlets I observe, where previously we had 2-way binding but if we attach a Glimmer Component to an outlet, we no longer have that option. 2-way binding via …

The two-way binding change refers to re-assigning arguments, but you can still mutate them. For example, this is not allowed in Glimmer components: this.args.topic = blah But this kind of thing: this.args.topic.title = "blah" is still possible. In fact, I don’t think re-assigning arguments is …

[image] David Taylor: The two-way binding change refers to re-assigning arguments, but you can still mutate them. Oh! That’s very interesting thanks!

Upgrading Discourse to Ember 4

Development

david (David Taylor) December 19, 2024, 5:46pm 21

Here we go @merefield

Topic		Replies	Views
Preparing for Discourse's upgrade to Ember 5 Announcements	57	7618	May 12, 2025
Upgrading Ember to 2.10 Development ember	71	10840	December 22, 2016
New installs will default to Ember CLI builds in Production Announcements ember	36	3610	June 17, 2022
Upcoming topic-list changes - how to prepare themes and plugins Development dev-news	35	1715	April 14, 2025
Site broken due to ember 5 upgrade Development	16	723	March 4, 2024

Upgrading Discourse to Ember 4

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