Add icon / notification for certain read topics

Hi all!

I was wondering if it’s possible to add an icon to a certain topic in a category (e.g. all topics in the Discourse support category) whenever it was read.

Here’s an example:


An alternative solution could be a badge notification after the topic title, like this:


Is there any example of how to do this in the CSS? Would be thankful if anyone could point me in the right direction.

Thank you very much.

Read to completion or just entered? Define what you mean by “read”

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Thanks. By “read” I mean read to completion.

There is a css style we apply to topic titles when they are read to completion, perhaps that would be of use?

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Thanks, Jeff. Do you know what the CSS selector / declaration for this is?