CourseGenix

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 2•Chapter 5

Real-World Project: Creating a Timer Application

Summary

The transcript includes frequent music segments, applause, and isolated words like do, so, and you.

Concept Check

0/5

What method ensures precise timing in a JavaScript timer app?

Use Date.now() method.

Rely on setInterval function.

Apply requestAnimationFrame.

Use performance.now() for accuracy.

How to handle timer drift in a long-running application?

Rely on system clock synchronization.

Use fixed setInterval intervals.

Recalculate elapsed time periodically.

Ignore minor time discrepancies.

Which design pattern is ideal for a timer application's state?

Singleton for global timer.

State pattern for mode management.

Observer for event handling.

Factory for timer creation.

What causes a timer to lose accuracy in multithreaded environments?

Improper variable initialization.

Network latency issues.

Insufficient CPU resources.

Context switching delays execution.

How to implement a countdown timer with pause functionality?

Store remaining time on pause.

Reset timer on pause action.

Use continuous setInterval loop.

Ignore pause and continue running.

PreviousRunning Effects on Component Updates