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React JS

Computer Science

Chapter 8 — React Routing and Navigation

Progress: 76%

Lesson 8.4 : Loading and Error States

Reading & Interactive Lesson

Lesson 8.4 FREE

Loading and Error States

Reading Material & Notes

Loading and Error States

Applications should provide feedback while data is loading and when an API request fails.

Common States

Loading
Success
Error
Empty result

Managing these states improves the user experience and makes API-driven interfaces more reliable.

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Course Curriculum

10 Chapters • 50 Lessons

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Chapter 1 — Introduction to React JS

5 Lessons

FREE

Lesson 1.1 : What is React JS?

Lesson 1.2 : Features of React

Lesson 1.3 : React vs Traditional JavaScript

Lesson 1.4 : React Components Overview

Lesson 1.5 : Applications of React JS

Chapter 2 — React Environment and Project Setup

5 Lessons

FREE

Lesson 2.1 : Installing Node.js and npm

Lesson 2.2 : Creating a React Project

Lesson 2.3 : React Project Folder Structure

Lesson 2.4 : Running a React Development Server

Lesson 2.5 : React Dependencies and package.json

Chapter 3 — JSX and React Components

5 Lessons

FREE

Lesson 3.1 : Introduction to JSX

Lesson 3.2 : JSX Expressions

Lesson 3.3 : Creating Functional Components

Lesson 3.4 : Reusable Components

Lesson 3.5 : Rendering Lists and Conditional Content

Chapter 4 — Props and State

5 Lessons

LOCKED

Lesson 4.1 : Introduction to Props

ENROLL

Lesson 4.2 : Understanding React State

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Lesson 4.3 : Props vs State

ENROLL

Lesson 4.4 : Passing Data Between Components

ENROLL

Lesson 4.5 : Lifting State Up

ENROLL

Chapter 5 — Events and Forms in React

5 Lessons

LOCKED

Lesson 5.1 : Handling Events in React

ENROLL

Lesson 5.2 : Handling Input Fields

ENROLL

Lesson 5.3 : React Forms

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Lesson 5.4 : Form Validation

ENROLL

Lesson 5.5 : Building a Registration Form

ENROLL

Chapter 6 — React Hooks

5 Lessons

LOCKED

Lesson 6.1 : Introduction to React Hooks

ENROLL

Lesson 6.2 : useState Hook

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Lesson 6.3 : useEffect Hook

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Lesson 6.4 : useRef Hook

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Lesson 6.5 : Custom Hooks

ENROLL

Chapter 7 — Conditional Rendering and Lists

5 Lessons

LOCKED

Lesson 7.1 : Introduction to React Router

ENROLL

Lesson 7.2 : Creating React Routes

ENROLL

Lesson 7.3 : Navigation with Link

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Lesson 7.4 : Route Parameters

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Lesson 7.5 : Protected Routes

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Chapter 8 — React Routing and Navigation

5 Lessons

LOCKED

Lesson 8.1 : Introduction to APIs

ENROLL

Lesson 8.2 : Fetching Data with fetch()

ENROLL

Lesson 8.3 : API Data with useEffect

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Lesson 8.4 : Loading and Error States

ENROLL

Lesson 8.5 : CRUD Operations with React API

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Chapter 9 — API Integration and State Management

5 Lessons

LOCKED

Lesson 9.1 : Understanding State Management

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Lesson 9.2 : React Context API

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Lesson 9.3 : useReducer Hook

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Lesson 9.4 : Redux Overview

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Lesson 9.5 : Managing Authentication State

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Chapter 10 — React Projects and Deployment

5 Lessons

LOCKED

Lesson 10.1 : Planning a React Project

ENROLL

Lesson 10.2 : Building a React Dashboard

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Lesson 10.3 : Optimizing a React Application

ENROLL

Lesson 10.4 : Building Production Version

ENROLL

Lesson 10.5 : Deploying a React Application

ENROLL

React JS

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