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useError react Code Snippet in 2022

hooksstateeffectintermediate

Last Updated: 28 December 2022

Creates an error dispatcher.

  • Use the useState() hook to create a state variable that holds the error.
  • Use the useEffect() hook to throw the error whenever it's truthy.
  • Use the useCallback() hook to update the state and return the cached function.
const useError = err => { const [error, setError] = React.useState(err); React.useEffect(() => { if (error) throw error; }, [error]); const dispatchError = React.useCallback(err => { setError(err); }, []); return dispatchError; };
Rconst ErrorButton = () => { const dispatchError = useError(); const clickHandler = () => { dispatchError(new Error('Error!')); }; return <button onClick={clickHandler}>Throw error</button>; }; ReactDOM.render(<ErrorButton />, document.getElementById('root'));

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