react

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;
};
const ErrorButton = () => {
  const dispatchError = useError();
 
  const clickHandler = () => {
    dispatchError(new Error('Error!'));
  };
 
  return <button onClick={clickHandler}>Throw error</button>;
};
 
ReactDOM.createRoot(document.getElementById('root')).render(
  <ErrorButton />
);
Python Syntaxreact-snippets