More types of scrollable/swipable content need to be added:
Scrolling triggering movements or animation (Parallax scrolling*)
Infinite scrolling (e.g.: loading more items of a list such as a SERP or a feed in a blog)
Open questions, research needed:
When content is changing on scrolling, can users with short attention spans understand and use?
Are possible types of motion harmful to people with vestibular disorders?
Can the combination in content between the background and the foreground or between appearing and disappearing, be understood by all users, also by keyboard and by screen reader users?
Does the scroll/swipe gesture need an alternative on mobile devices?
Rationale:
It should be a Guideline itself in order to make ‘Scrolling content’ visible and findable, It is not only relevant for keyboard operability.
Please note: I thought it was a design trend only, but since more than 10 years it doesn’t end and right now I am asked for advice on what needs to be considered for making it accessible.
*= Parallax scrolling is a design effect where background elements move at different speeds than foreground elements while scrolling. The movement is usually a disclosure of elements such as images and chunks of text and the combination can for example simulate an animated story telling.
Outcomes as pointed out in atomic rule: https://www.w3.org/WAI/standards-guidelines/act/rules/0ssw9k/proposed/#top
More types of scrollable/swipable content need to be added:
Open questions, research needed:
Rationale:
*= Parallax scrolling is a design effect where background elements move at different speeds than foreground elements while scrolling. The movement is usually a disclosure of elements such as images and chunks of text and the combination can for example simulate an animated story telling.