I have searched, but can’t find any extensions for this.
It could be very useful on many “hobby” boards, enabling users to show before/after images with a slider.
Example on W3Schools:
https://www.w3schools.com/howto/howto_j ... arison.asp
Any one of you talented phpBB coders who want to give it a go ?
PS: I hope this request is in the right forum?