I sometimes feel like there are three. The class components way, the hooks way that everyone has been doing it up until a few months ago, and the hooks way that the beta docs say you should do it. Maybe those last two aren't different enough, but the clashing philosophies around useEffect are enough to require massive refactors.
EDIT: I'm referring to how the proper use of useEffects is to almost never use them. They're for side effects, and they're not a tool to just "re-render when these dependencies change". But to do this right, it requires a re-wiring of the mental model of how to do React, at least for many people I've come across.
EDIT: I'm referring to how the proper use of useEffects is to almost never use them. They're for side effects, and they're not a tool to just "re-render when these dependencies change". But to do this right, it requires a re-wiring of the mental model of how to do React, at least for many people I've come across.