useInterval

Published 📅: ....
Last modified 📝: ....
Location 📍: Netarts, OR

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import { useState, useEffect, useRef } from 'react';
 
export 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) {
      let id = setInterval(tick, delay);
      return () => clearInterval(id);
    }
  }, [delay]);
}

Originally sourced from Dan Abramov's blog

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