I have a gallery that displays images of alumni members of a group. The images are connected to a collection and dataset and are all displaying as required. However, I would like to add a dropdown menu that filters the images to display individuals based on the year they left the group e.g. 2019, 2018 - all of which are already inside the database.
The dropdown would show as follows:
1) All Images
How can I connect the dropdown menu to my gallery to filter the images as required?
The gallery is the first on the following URL: http://www.ucdchoralscholars.ie/csalumni
I have found similar posts to this but unable to find a specific guide for my requirements.