React useEffect() hook introduction 🌟

#react #tutorial #course

00:00:00 introduction

00:02:00 setup

00:03:25 no dependencies

00:04:50 empty dependency array

00:05:51 1 dependency

00:07:25 multiple dependencies

00:09:57 why use useEffect()?

00:11:33 example 2

00:15:51 return

00:17:31 multiple useEffect() hooks

00:18:52 conclusion

// useEffect()

// React Hook that tells React to DO THIS CODE WHEN:

// (pick one)

// This component re-renders

// This component mounts

// The state of a value changes

// useEffect(function, [dependencies])

// USES

// #1 Event Listeners

// #2 DOM manipulation

// #3 Subscriptions (real-time updates)

// #4 Fetching Data from an API

// #5 Clean up when a component unmounts