How to implement QRcode generator in react (Updated 2024)

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Creating a QR code generator in ReactJS allows you to integrate dynamic QR code generation into your applications. This tutorial will guide you through the setup of a ReactJS project and show you step-by-step how to create a QR code generator using the qrcode.react library. By the end of this article, you will be able to generate QR codes dynamically based on user input, customize their appearance, and understand how to integrate this functionality into your ReactJS applications.

Prerequisites

Before we start, ensure you have the following installed:

• Node.js (which includes npm)
• A code editor (e.g., VSCode)

Steps to integrate QRcode generator in React Application

Step 1: Setting Up Your React Environment

Create a New React App

Open your terminal and run the following command to create a new React app named qr-code-generator:

npx create-react-app qr-code-generator

Navigate to Your App Directory

Change your directory to the newly created app:

cd qr-code-generator

Step 2: Integrating QR Code Library

Install qrcode.react

While in your app’s root directory, run the following command to install qrcode.react:

npm install qrcode.react

Step 3: Building the QR Code Generator Component

Create a QR Code Component

Inside your src folder, create a new file named QRCodeGenerator.js. This file will hold our QR code component.

Import Dependencies

At the top of QRCodeGenerator.js, import React and the QRCode component from qrcode.react:

import React, { useState } from 'react';
import QRCode from 'qrcode.react';

Create the QRCode Generator Component

Below the imports, define a functional component that utilizes useState to manage the input value for the QR code:

const QRCodeGenerator = () => {
  const [inputValue, setInputValue] = useState('');

  return (
    <div>
      <input
        type="text"
        placeholder="Enter text to generate QR Code"
        value={inputValue}
        onChange={(e) => setInputValue(e.target.value)}
      />
      <QRCode value={inputValue ? inputValue : 'https://example.com'} />
    </div>
  );
};

export default QRCodeGenerator;

Step 4: Integrating the QR Code Generator into Your App

Modify App.js

Open App.js and modify it to include the QRCodeGenerator component:

import React from 'react';
import './App.css';
import QRCodeGenerator from './QRCodeGenerator';

function App() {
  return (
    <div className="App">
      <header className="App-header">
        <QRCodeGenerator />
      </header>
    </div>
  );
}

export default App;

Start the Development Server

Run npm start in your terminal to launch the development server. Visit http://localhost:3000 in your browser, and you should see your QR code generator in action.

Conclusion

You’ve successfully created a QR code generator using ReactJS and the qrcode.react library! This tutorial covered setting up a React application, integrating a QR code library, and creating a functional component to generate QR codes dynamically based on user input.

QRcode generator – FAQ