New answers tagged transitions
I would say (from personal preferences) - make them as fast as possible, without being too fast so the user can't distinguish what happened. If, for example, a navigation bar is to slide in from the left side on a button click, make it as fast as possible, without losing the feeling of the menu sliding in, thus making it look like it just suddenly ...
"Does it vary widely for different kinds of transitions?" Yes. I think the key here is the impact the transition has on the usability of the interface. If the transition makes the user wait before they can continue with a common task, even a short transition can become very frustrating. For example, a 200ms transition that delays displaying the options ...
Please see Animate.css for a list of common animation names.
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