useEffect should not be capitalized because it's a function name (I guess HN's title auto-mangling did this). While we are at it, I would suggest to specify in

useEffect should not be capitalized because it's a function name (I guess HN's title auto-mangling did this). While we are at it, I would suggest to specify in the submission title that it's about React, and it's also from 2021, so: A Visual Guide to React's useEffet hook (2021)