useEffect(fn, []) is not the new componentDidMount()

useEffect(fn, []) is not the new componentDidMount()

useEffect(fn, []) is not the new componentDidMount() They're almost the same. But there's actuall...概要を表示 useEffect(fn, []) is not the new componentDidMount() They're almost the same. But there's actually just enough of a difference to possibly get you into trouble -- especially if you're refactoring from classes. We often times do some setup when the component first mounts like a network call or a subscription. We have taught ourselves to think in terms of "moments in time" with things like component

• あとで読む