MyComponentWithInterval.js

import React, { useEffect } from 'react';

const MyComponentWithInterval = () => {
  useEffect(() => {
    const myInterval = setInterval(() => {
          console.log('Hello World');
    }, 5000);
    return () => clearInterval(myInterval);
  }, []);
  
  return (<p>We write Hello World into the consol every 5 seconds.</p>);
};

export default MyComponentWithInterval;