It may allow beginners to taste the sweetness of not following the rules

Summary

https://react.dev/learn/queueing-a-series-of-state-updates

The first challenge in this chapter can still work normally even if it is written like this, because it relies on click behavior

async function handleClick() {
    setPending(pending + 1);
    await delay(3000);
    setPending(pending=>pending - 1);
    setCompleted(completed=>completed + 1);
  }

However, if it is changed to this, it will not work. At this point, we must change setPending(pending + 1) to setPending(pending => pending + 1)

async function handleClick() {
    setTimeout(()=> {setPending(pending + 1);}, 1000)
    await delay(3000);
    setPending(pending=>pending - 1);
    setCompleted(completed=>completed + 1);
  }

Page

https://react.dev/learn/queueing-a-series-of-state-updates

Details

Perhaps some annotations could be added

Commencez par la page liée queueing-a-series-of-state-updates et examinez le premier exercice ainsi que ses exemples de mise à jour de l’état. Reproduisez la variante différée avec setTimeout décrite dans l’issue, puis déterminez où une annotation devrait expliquer la forme de l’updater fonctionnel. C’est terminé lorsque la page avertit clairement de ce cas et que l’exercice reste compréhensible.