tipsy was "deprecated" years ago, with no suitable substitute.
current doc recommends using "oojs", but i could not locate any oojs functionality pertaining to tooltips, IOW, no oojs class/object/api which can replace tipsy.
at the very least, i suggest removing this null recommendation from the doc.
if i missed something, and there _si_ some oojs things which can replace tipsy, please provide more precise link in the doc (and in any answer to this post).
thanks, peace -