Hi everyone! I’m having trouble with change detection in a Glimmer component and could use some guidance. When I mutate properties on objects within a `@tracked` array, the template doesn’t re-render. **My Setup:** ```javascript import Component from '@glimmer/component'; import { tracked } fro…

Hmm, that’s weird. Doing the array assignment trick usually works. An alternative I’ve found is to make the objects in the array be from a class with its own tracked properties. Something like: class CustomSidebarItem { @tracked expanded = false; constructor(id, label) { this.id = id; …

I believe when you track an array like described in OP you’re tracking the array reference and not changes to the individual objects within the array Another way to handle it is using trackedObject, we use this in a handful of places throughout Discourse app/assets/javascripts/discourse/ap…

Thanks for your input. I do have another follow up questions : Would using a library like immer work? If yes, how should I include immer in discourse? I have seen mentions of ‘copy it into assets from node_modules’, but I would prefer it if there is a way to do it via npm, or even a cdn link in …

You can use loadScript() to load JS, even if the URL provided is an external URL. Using external services like jsdelivr should work with this. import loadScript from "discourse/lib/load-script"; ... loadScript(URL).then(() => { // your code }) Though I haven’t tested it extensively, a dynamic…

Glimmer Component Change Detection Not Working - Mutating Properties in @tracked Array

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Steve_John (Steve John) August 12, 2025, 6:56am 3

Hi Alteras,

Thank you for your suggestion !!! It did work as suggested by you approach and really made our day bit easy ::)**

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Glimmer Component Change Detection Not Working - Mutating Properties in @tracked Array

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