I came across this problem myself and managed to fix it by passing a key to the React-Select component, with the selected value appended to it. This will then force the ReactSelect to re-render itself when the selection is updated. I hope this helps someone. import ReactSelect from ‘react-select’; … <ReactSelect key={`my_unique_select_key__${selected}`} value={selected || ”} … Read more
You can make use of useRef and store the props to be used within a closure such as render useEffect return callback method function Home(props) { const val = React.useRef(); React.useEffect( () => { val.current = props; }, [props] ); React.useEffect(() => { return () => { console.log(props, val.current); }; }, []); return <div>Home</div>; } … Read more
There is no built-in way to set the state to its initial value, sadly. Your code looks good, but if you want to decrease the functions needed you can put your entire form state in a single state variable object and reset to the initial object. Example const { useState } = React; function signupUser() … Read more
If you want the useEffect to run only on updates except initial mount, you can make use of useRef to keep track of initialMount with useEffect without the second parameter. const isInitialMount = useRef(true); useEffect(() => { if (isInitialMount.current) { isInitialMount.current = false; } else { // Your useEffect code here to be run on … Read more
TL;DR – if the state changes are triggered asynchronously (e.g. wrapped in a promise), they will not be batched; if they are triggered directly, they will be batched. I’ve set up a sandbox to try this out: https://codesandbox.io/s/402pn5l989 import React, { Fragment, useState } from ‘react’; import ReactDOM from ‘react-dom’; import ‘./styles.css’; function Component() { … Read more
A short explanation. useEffect It’s the alternative for the class component lifecycle methods componentDidMount, componentWillUnmount, componentDidUpdate, etc. You can also use it to create a side effect when dependencies change, i.e. “If some variable changes, do this”. useCallback On every render, everything that’s inside a functional component will run again. If a child component has … Read more
If you are referring to component state, then hooks will not help you share it between components. Component state is local to the component. If your state lives in context, then useContext hook would be helpful. Fundamentally, I think you misunderstood the line “sharing stateful logic between components”. Stateful logic is different from state. Stateful … Read more
Here is how you do it: // sample data structure /* const data = [ { id: 1, name: ‘john’, gender: ‘m’ } { id: 2, name: ‘mary’, gender: ‘f’ } ] */ // make sure to set the default value in the useState call (I already fixed it) const [data, setData] = useState([ { … Read more
Both options are valid, but just as with setState in a class component you need to be careful when updating state derived from something that already is in state. If you e.g. update a count twice in a row, it will not work as expected if you don’t use the function version of updating the … Read more
I faced the same issue. What I was doing was something like this: const Table = (listings) => { const {isLoading} = useSelector(state => state.tableReducer); if(isLoading){ return <h1>Loading…</h1> } useEffect(() => { console.log(“Run something”) }, []) return (<table>{listings}</table>) } I think what was happening was that on the first render, the component returned early and … Read more