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Create a Coin Flipping App using ReactJS

Create a Quiz App using ReactJS

Last Updated : 09 Jan, 2025

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In this article, we will create a quiz application to learn the basics of ReactJS. We will be using class components to create the application with custom and bootstrap styling. The application will start with questions at first and then the score will be displayed at last. Initially, there are only 5 questions but you can keep adding more questions to make the quiz interesting.

Let's have a look at what our final project will look like:

Quiz App using ReactJS

Modules required:

npm
React
Bootstrap

Steps to create the project:

Step 1: Create the project file using the command.

npx create-react-app quiz

Step 2: Navigate to the folder using the command

cd quiz

Step 3: Install the required module using the command.

npm i bootstrap

Step 4: Create a folder named components in src file and create new files Option.js, Question.js, QuestionBank.js, and Score.js

Project Structure:

The dependencies in package.json will look like:

package.json

"dependencies": {
    "@testing-library/jest-dom": "^5.16.5",
    "@testing-library/react": "^13.4.0",
    "@testing-library/user-event": "^13.5.0",
    "bootstrap": "^5.3.0",
    "react": "^18.2.0",
    "react-dom": "^18.2.0",
    "react-scripts": "5.0.1",
    "web-vitals": "^2.1.4"
},

Write the following codes in different files.

Example:

App.js: This is our main file where all the logic for scoring and questions is written and other components are imported
Question.js: This component contains the question component to be displayed
QuestionBank.js: This component contains the raw data of the questions in our file
Option.js: This component has options corresponding to a particular question
Score.js: This component is used to display the final soce

CSS

/* App.css */  body {   background-color: #292b2e;   color: #ffffff; }  .app-title {   color: #ffffff;   margin-top: 2rem; }

JavaScript

// App.js  import React, { Component } from "react"; import "bootstrap/dist/css/bootstrap.min.css"; import Question from "./Components/Question"; import qBank from "./Components/QuestionBank"; import Score from "./Components/Score"; import "./App.css";  class App extends Component {     constructor(props) {         super(props);         this.state = {             questionBank: qBank,             currentQuestion: 0,             selectedOption: "",             score: 0,             quizEnd: false,         };     }      handleOptionChange = (e) => {         this.setState({ selectedOption: e.target.value });     };      handleFormSubmit = (e) => {         e.preventDefault();         this.checkAnswer();         this.handleNextQuestion();     };      checkAnswer = () => {         const { questionBank, currentQuestion, selectedOption, score } = this.state;         if (selectedOption === questionBank[currentQuestion].answer) {             this.setState((prevState) => ({ score: prevState.score + 1 }));         }     };      handleNextQuestion = () => {         const { questionBank, currentQuestion } = this.state;         if (currentQuestion + 1 < questionBank.length) {             this.setState((prevState) => ({                 currentQuestion: prevState.currentQuestion + 1,                 selectedOption: "",             }));         } else {             this.setState({                 quizEnd: true,             });         }     };      render() {         const { questionBank, currentQuestion, selectedOption, score, quizEnd } =             this.state;         return (             <div className="App d-flex flex-column align-items-center justify-content-center">                 <h1 className="app-title">QUIZ APP</h1>                 {!quizEnd ? (                     <Question                         question={questionBank[currentQuestion]}                         selectedOption={selectedOption}                         onOptionChange={this.handleOptionChange}                         onSubmit={this.handleFormSubmit}                     />                 ) : (                     <Score                         score={score}                         onNextQuestion={this.handleNextQuestion}                         className="score"                     />                 )}             </div>         );     } }  export default App;

JavaScript

// Question.js  import React, {Component} from "react"; import Options from "./Option";  class Question extends Component{     render() {         const {question, selectedOption, onOptionChange, onSubmit} = this.props;          return(             <div className="">                 <h3>Question {question.id}</h3>                 <h5 className="mt-2">{question.question}</h5>                 <form onSubmit={onSubmit} className="mt-2 mb-2">                     <Options                         options={question.options}                         selectedOption={selectedOption}                         onOptionChange={onOptionChange}                     />                     <button type="submit" className="btn btn-primary mt-2">                         SUBMIT                     </button>                 </form>                              </div>         )     } }  export default Question;

JavaScript

// Option.js  import React, { Component } from 'react';  class Options extends Component {     render() {         const { options, selectedOption, onOptionChange } = this.props;          return (             <div className='options'>                 {options.map((option, index) => (                     <div key={index} className="form-check">                         <input                             type="radio"                             name="option"                             value={option}                             checked={selectedOption === option}                             onChange={onOptionChange}                             className="form-check-input"                         />                         <label className="form-check-label">{option}</label>                     </div>                 ))}             </div>         );     } }  export default Options;

JavaScript

// Score.js  import React, { Component } from 'react'; import '../App.css'  class Score extends Component {     render() {         const { score, onNextQuestion } = this.props;          return (             <div>                 <h2>Results</h2>                 <h4>Your score: {score}</h4>             </div>         );     } }  export default Score;

JavaScript

// QuestionBank.js  const qBank = [     {         id: 1,         question: "What is the capital of Haryana?",         options: ["Yamunanagar", "Panipat", "Gurgaon", "Chandigarh"],         answer: "Chandigarh",     },     {         id: 2,         question: "What is the capital of Punjab?",         options: ["Patiala", "Ludhiana", "Amritsar", "Chandigarh"],         answer: "Chandigarh",     },     {         id: 3,         question: "What is the capital of India?",         options: ["Delhi", "Mumbai", "Kolkata", "Chennai"],         answer: "Delhi"     },     {         id: 4,         question: "What is the capital of Uttarakhad?",         options: ["Roorkee", "Haridwar", "Dehradun", "Nanital"],         answer: "Dehradun"     },     {         id: 5,         question: "What is capital of Uttar Pradesh?",         options: ["GB Nagar", "Lucknow", "Prayagraj", "Agra"],         answer: "Lucknow"     }, ]  export default qBank;

Building a quiz app is a fun way to apply your React knowledge.

Steps to run the application:

Step 1: Type the following command in your command line

npm start

Step 2: Open http://localhost:3000/ URL in the browser. It will display the result.

Output:

Peek-2023-06-07-12-36

Create a Coin Flipping App using ReactJS

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itsvinayak

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