I tried adding the theme selector to my instance but it doesn’t show up, I’ve updated, disabled it and re-added it, cleared cf cache, rebuilt instance. First one I added was dark mode switcher, worked for a few days then Idr what I did then it stopped working, I remember this being a thing some year…

Have you tried using it with different themes? What theme are you using?

Are you using this TC? [image] Sidebar Theme Toggle Theme component discourse2 Summary Sidebar Theme Toggle adds a theme selector in the sidebar menu’s footer provided there is more than 1 user selectable theme. This selector works with both logged-on us…

That’s correct, even tried this tc and it worked for a dew days and I think I disabled it to try the theme selector and it stopped working when I enabled it back [image] Dark/Light Mode Toggle Theme component discourse2 Summary Dark/Light Mode Toggle adds…

A few things to check. First I’d make sure that Discourse and the theme component are up to date. I would then try using the preview button at the bottom of the theme component’s setting page — this will show the theme component in isolation. If the preview works, there’s likely a conflict with an…

Turns out it was me. I didn’t add another theme to the site, I assumed color pallets were “another theme of my default theme”, but still doesn’t explain why the dark mode switcher stopped working. Yes I did everything correctly.

Turns out I didn’t do this! I feel so stupid

Theme components issue

Support

Arkshine April 29, 2024, 11:50am 5

Can you check if the theme component is attached to your theme?

Also, do you see any error in the browser’s console?

Topic		Replies	Views
Sidebar Theme Toggle Theme component official , sidebar , sidebar-theme-toggle	32	10695	June 26, 2026
Can not find the light/dark theme toggle when sidebar enabled Support	3	841	November 18, 2022
Discourse theme selection doesn't work after update to 2.9.0beta1 Support	1	432	September 16, 2024
Hamburger Theme Selector Theme component end-of-life	69	24672	May 30, 2023
Dark/light mode toggle now available in core Announcements	27	3221	March 17, 2025

Theme components issue

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