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 1•Chapter 3

Basic Usage of useState

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What is required to use the useState hook in a React component?

Only in class components.

Install a separate package.

Use it without importing.

Import useState from the react library.

In useState(0), what does the argument represent?

A function to update state.

The initial state value.

The updated state value.

The component's props.

Why should you not update state directly in useState?

It improves performance.

It changes the initial value.

It updates immediately.

It won't cause re-render.

What happens when you call the setter from useState?

Nothing without props.

Changes global state.

Updates DOM directly.

Triggers component re-render.

In a counter app, how is state managed with useState?

Using an array with value and setter.

With a single variable.

Through class properties.

Via context API only.

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