yeah because this [spoiler]just an example[/spoiler] doesn't work your are suppose to see a black bar.
if not then I tried
Oh I see. The one you linked in your first post though says "obscures text in a box until the user clicks on it" which is also the same as the hide tag, but I think you're looking for one that "obscures text until user hovers on it"?
Unfortunately ones like the following aren't compatible with the newer version of phpbb:https://www.phpbb.com/customise/db/mod/ ... poiler_mod
Is there any recent extension/code for phpbb version 3.1.x? I searched phpbb site and the on hover ones seem to be over a decade old mods so no longer compatible sadly, and another I found mentioned in the past year apparently doesn't work well on mobiles, I hear the current layout is meant to be compatible for mobile too.