For your scenario (where you cannot keep creating new callbacks and passing them to your 3rd party library), you can use useRef to keep a mutable object with the current state. Like so: function Card(title) { const [count, setCount] = React.useState(0) const [callbackSetup, setCallbackSetup] = React.useState(false) const stateRef = useRef(); // make stateRef always have … Read more
after wrap the component by React.forwardRef and pass ref from parent component you need to reload the app ! i faced that now and saw the same error message and simply solved by reloading the app
You need to clear your interval, useEffect(() => { const intervalId = setInterval(() => { //assign interval to a variable to clear it. setState(state => ({ data: state.data, error: false, loading: true })) fetch(url) .then(data => data.json()) .then(obj => Object.keys(obj).map(key => { let newData = obj[key] newData.key = key return newData }) ) .then(newData => … Read more
The simple answer here is, you probably shouldn’t use useCallback here. The point of useCallback is to pass the same function instance to optimized components (e.g. PureComponent or React.memoized components) to avoid unnecessary rerenders. You’re not dealing with optimized components in this case (or most cases, I’d suspect) so there’s not really a reason to … Read more
The current preferred route is useCallback, which is the same as your useMemo solution, but with additional possible optimizations in the future. Pass an empty array [] to make sure the function will always have the same reference for the lifetime of the component. Here, you also want to use the functional state update form, … Read more
What are the advantages and use cases of the Effect hook (useEffect())? Advantages Primarily, hooks in general enable the extraction and reuse of stateful logic that is common across multiple components without the burden of higher order components or render props. A secondary benefit (of Effect hooks in particular) is the avoidance of bugs that … Read more
The setter function won’t change during component life. From Hooks FAQ: (The identity of the setCount function is guaranteed to be stable so it’s safe to omit.) The setter function (setState) returned from useState changes on component re-mount, but either way, the callback will get a new instance. It’s a good practice to add state … Read more
In react 17, if code execution starts inside of react (eg, an onClick listener or a useEffect), then react can be sure that after you’ve done all your state-setting, execution will return to react and it can continue from there. So for these cases, it can let code execution continue, wait for the return, and … Read more
The “nextCreate is not a function” error is thrown when you’re not passing a function as a useMemo() argument. For example, useMemo(123, []) will throw and useMemo(() => 123, []) won’t.
TL;DR use useCallback() First of all, using a function as a dependency is very dangerous. If that function causes a state change, then the subsequent re-render will invoke the function again (through useEffect)… and an infinite loop begins. One thing you can do, as many suggest here, is to create the function within the useEffect() … Read more