Unfortunately with respect to Feather Wiki, fuse.min.js is too large (23KB) :) But the fuzzy search is a good idea. If you find a very tiny js search lib, please post it here on HN or here: https://codeberg.org/Alamantus/FeatherWiki/issues
Thank you to the GP for the suggestion to use https://fusejs.io
I wasn't aware that it's easy to implement one's own search engine.