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Built-in React Hooks

5 Units25 Lessons
Unit 1

State Hooks

Real-World Project: Building a Counter Application
Introduction to useState Hook
Basic Usage of useState
Updating State with useState
Handling Complex State with useState
Unit 2

Effect Hooks

Introduction to useEffect Hook
Managing Dependencies in useEffect
Fetching Data with useEffect
Running Effects on Component Updates
Real-World Project: Creating a Timer Application
Unit 3

Ref Hooks

Basics of useRef Hook
Using useRef for DOM Access
Persisting Values with useRef
Forwarding Refs in React
Real-World Project: Implementing Focus Management
Unit 4

Context Hooks

Creating Context Providers
Consuming Context in Nested Components
Real-World Project: Building a Theme Switcher
Using useContext Hook
Understanding React Context
Unit 5

Performance Hooks

Using useCallback for Function Memoization
Preventing Unnecessary Re-renders
Introduction to useMemo Hook
Real-World Project: Optimizing a List Rendering Component
Memoizing Expensive Calculations
Unit 5•Chapter 2

Preventing Unnecessary Re-renders

Summary

The video explains how to debug and fix performance issues in a slow React application using the right tools. It features a complex project where the task board page experiences significant slowdowns, while other pages remain responsive. The host notes that the root cause isn't directly tied to the task board code. To identify and resolve these issues, it recommends using the React Profiler from React Dev Tools to analyze and understand performance problems effectively.

Concept Check

0/5

Which method optimizes re-renders in class components?

Which React hook prevents unnecessary re-renders by memoizing values?

How does React.memo help in preventing re-renders?

What is a key cause of unnecessary re-renders in React?

In React Profiler, how to identify unnecessary re-renders?

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