If my job involved web development, I'd be inclined to get hold of a copy of Heydon Pickering's Inclusive Components: The Book.
Taking the entry on A Content Slider, we start with this…
Carousels (or 'content sliders') are like men. They are not literally all bad — some are even helpful and considerate. But I don't trust anyone unwilling to acknowledge a glaring pattern of awfulness. Also like men, I appreciate that many of you would rather just avoid dealing with carousels, but often don't have the choice. Hence this article. Carousels don't have to be bad, but we have a culture of making them bad. […]
… followed by a reasoned explanation of how to do this stuff better for everyone, including plenty of snippets of CSS illustrating step-by-step how it all works. From my point of view as an interested amateur, it look to be good work, communicated very effectively.
[Via Pinboard: philgyford]