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Built-in React Hooks
5 Units
25 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 3
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Chapter 5
Real-World Project: Implementing Focus Management
Summary
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In React, how does useRef help in focus management without causing re-renders?
Triggers component re-render on change.
Directly accesses DOM elements for focus.
It stores mutable values without triggering re-renders.
Similar to useState for rendering updates.
What is a key advantage of using useRef for implementing focus in a form?
Triggers focus without user interaction.
Avoids unnecessary component re-renders.
Automatically updates state on focus.
Persists values across renders.
Why might useRef be preferred over useState for managing focus on an input?
It directly manipulates the DOM.
It handles asynchronous updates better.
It integrates with event handlers seamlessly.
It doesn't cause the component to re-render.
In a real-world project, how does changing a ref's current value affect focus?
Requires state to propagate changes.
Immediately re-renders the component.
Updates the DOM directly for focus.
It allows manual focus without re-rendering.
What potential pitfall exists when using useRef for focus management?
It fails to persist across renders.
It causes infinite loops in components.
Changes don't trigger re-renders if needed.
It directly alters the component state.
5 questions remaining
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Forwarding Refs in React