This is just iteration on the awesome groundwork that React laid, and shows that things can still be much better. React has some very peculiar patterns that don't really jive well with javascript as a language, or its ecosystem. If the setInterval example is fundamentally against what React is, then IMO that really hammers the point the author is making. I have a few React projects under my belt, and often times still find myself confused by hooks or the mess that I create when I use them.
bryanrasmussen|4 years ago
seer|4 years ago
For example a flurry of setStates could be wrapped up in one single state. If it gets too complex - into a reducer.
Components that don’t benefit much from splitting up could have their business logic wrapped into a context, and let the view code be just jsx without all the interweaving of code and templates.
Maybe the one benefit of classes was like it forced you to think in business logic, then render. React still has that, you just need to dive a bit deeper into its toolbox.
The result usually turns out much more flexible - contexts neatly wrap business logic for all of its descendants, classes don’t.
I think this was maybe because react actually allows you to write messy code, and it’s still performant and works. But in the end it just kinda postpones the inevitable maintenance burden.
I guess solid.js from the looks of it might postpone it a bit more. I just worry that solid looks more like magic, and some invariant somewhere will just break and I wouldn’t know what sequence of reactions actually led to that infinite loop that crashed the page. Haven’t tried it myself though, might more understandable in the end…
progrus|4 years ago
It’s understandable to stumble into this difficulty though, and a bit of deceptive marketing on the part of the hooks folks. They should be upfront that using hooks well in a real app requires a lot of careful thinking of the kind that many “typical” programmers do not have much practice in, and then the maintenance of whatever code comes from the effort. The functional-programming-mindshare situation seems to be improving slowly, but still.
onion2k|4 years ago
If the lifecycle methods you're referring to are things like componentWillReceiveProps or getDerivedStateFromProps then the React blog covers why they were problematic https://reactjs.org/blog/2018/06/07/you-probably-dont-need-d.... It was very common for developers to make things that would repeatedly rerender when other parts of their app updated. Hooks make that far less likely to happen.
That said, I agree that a getDerivedStateFromProps method is more readable and much clearer than useEffect(()=>{ // stuff }, [big, list, of, props]);
Scarblac|4 years ago