Скачать или смотреть React useEffect Explained — Master Side Effects in 10 Minutes

Welcome to Frontend Weekly!

In this episode, we dive into one of the most important hooks in React — useEffect. This hook lets you manage side effects like fetching data, setting up subscriptions, syncing with localStorage, and much more — all inside functional components.

No more componentDidMount or componentWillUnmount. Just one powerful hook to rule them all.

✅ In this video, you’ll learn:
• What useEffect does and how it works
• How it replaces lifecycle methods from class components
• The role of the dependency array
• Cleanup functions
• Common mistakes and how to avoid them
• Real-world useEffect examples

Whether you’re a beginner or improving your React skills — this is the guide for you!

00:00 Intro
00:30 What is useEffect?
02:00 Syntax and dependencies
03:30 Data fetching example
04:30 Event listener + cleanup
06:00 Sync with state (localStorage)
07:00 Common mistakes
09:00 Recap & Next steps