I have a soft spot for these JS fuzzy matchers, but there are so many that it’s worth talking about about the specific tradeoffs you chose / ideally offering an interactive comparison like μFuzzy does:

https://github.com/leeoniya/uFuzzy

OP here, I wanted to add one technical note I forgot to mention in the post.

The prefix search uses the same suffix array as the substring search. This approach might also be useful for other search libraries that rely on suffix arrays. It can improve the search experience with minimal additional effort.

Happy to discuss the implementation details if anyone’s curious!