Hey. I have always used details like this
[details="open"]
This should be visible
[/details]
open
This should be visible
I wasn’t aware you could also use
<details open>
This should be visible
</details>
Will try with the =
<details=“open”>
This should be visible
Doesn’t work as above
<details="open">
This should be visible
</details>
Only seems to work as per your last example.
This should be visible
Kind of cool though as the <> see s to default to open. Always learning new things)routes in discourse.