JAVASCRIPT

Manage Recurring Actions with useInterval Hook

A custom React hook for setting up and clearing `setInterval` calls, ensuring that recurring actions are handled safely and effectively within your components.

import { useEffect, useRef } from 'react';

function useInterval(callback, delay) {
  const savedCallback = useRef();

  // Remember the latest callback.
  useEffect(() => {
    savedCallback.current = callback;
  }, [callback]);

  // Set up the interval.
  useEffect(() => {
    function tick() {
      savedCallback.current();
    }
    if (delay !== null) {
      const id = setInterval(tick, delay);
      return () => clearInterval(id);
    }
  }, [delay]);
}

export default useInterval;

// Example Usage:
// function Timer() {
//   const [count, setCount] = useState(0);

//   useInterval(() => {
//     setCount(count + 1);
//   }, 1000); // Update every 1 second

//   return <div>Count: {count}</div>;
// }

How it works: The `useInterval` hook provides a robust way to implement recurring actions using `setInterval` in React. It stores the provided callback in a `useRef` to ensure that the interval always calls the latest version of the function without needing to restart the interval itself. The `useEffect` hook manages the `setInterval` and `clearInterval` lifecycle, automatically clearing the interval when the component unmounts or when the `delay` changes.

Manage Recurring Actions with useInterval Hook

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