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How to Create a QR Code in ReactJS

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by vsasikalabe dot icon Updated: Jul 25, 2023

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QR codes are a type of two-dimensional barcode that can be scanned with a smartphone or other device to access information or perform an action. They are frequently employed in applications such as marketing and advertising, event ticketing, and others when it is required to swiftly access information or carry out an activity using a mobile device. 


Following are some instances of how QR codes could be applied in a React application: 

  • Marketing and advertising: QR codes can be used to point consumers to a particular website or social media account, as well as to access exclusive deals or discounts. 
  • Event ticketing: QR codes can be used to create electronic tickets for events, allowing attendees to enter the venue by simply scanning their tickets. 
  • Product packaging: QR codes can be scanned to get details about a product, like its ingredients or usage directions. 
  • Access control: QR codes can open doors to places off-limits to the general public, including office buildings or VIP zones at sporting or musical events. 

The npm package "react-QR-code" enables you to create QR codes in React applications. It is a straightforward, lightweight, and user-friendly package that offers a React component for creating QR codes. 


Here is how you can create a QR code using React: 

Preview of the output that you will get on running this code from your IDE.


Code:

In this solution we use the React library.

qr code shows up immediatly before i click the button reactjs

JavaScriptdotLines of Code : 60dotLicense : Strong Copyleft (CC BY-SA 4.0)

Dependent Libraries : 
import React from "react";
import QRCode from "react-qr-code";

import { useState } from "react";

function QrCodeInfo() {
  const [wifiName, setWifiName] = useState("");
  const [password, setPassword] = useState("");
  const [qrCodeVisible, setQrCodeVisible] = useState(false);

  const clickButton = () => {
    let qrimage = password;
    setQrCodeVisible(!!qrimage);
  };

  return (
    <div className="center">
      <div className=" center card shadow">
        <div className="flex">
          <form>
            <div className="user-details">
              <div className="input-box">
                <span className="details">WifiName</span>
                <input
                  type="text"
                  placeholder="Enter your WifiName"
                  value={wifiName}
                  onChange={(event) => setWifiName(event.target.value)}
                  required
                />
              </div>
              <div className="input-box">
                <span className="details">Password</span>
                <input
                  type="text"
                  placeholder="Enter your Password"
                  value={password}
                  onChange={(event) => setPassword(event.target.value)}
                  required
                />
              </div>
            </div>
            <div className="center">
              <button type="button" className="center" onClick={clickButton}>
                Submit
              </button>
            </div>
          </form>
          <div>
            <h1>{wifiName}</h1>
            {qrCodeVisible && <QRCode value={password} />}
          </div>
        </div>
      </div>
    </div>
  );
}

export default QrCodeInfo;

Instructions

Follow the steps carefully to get the output easily.

  1. Install the Node.js and React on your IDE(preferable Visual Studio Code).
  2. Create React Application using npx create-react-app foldername.
  3. cd foldername.
  4. npm i react-qr-code.
  5. Open the folder in IDE.
  6. Copy the code using "copy" button above and paste it in App.js file(remove the earlier code from App.js).
  7. Open the terminal from IDE.
  8. npm start to run the file.


You can also refer this url DEMO for getting above output.

I hope you found this useful. I have added the link to dependent libraries, version information in the following sections.


I found this code snippet by searching for 'Create QR Code using React ' in kandi. You can try any such use case!

Environment Tested

I tested this solution in the following versions. Be mindful of changes when working with other versions.

  1. The solution is created in VS Code 1.73.1 version.
  2. The solution is tested on Nodejs 16.14.2 version.
  3. react 18.2.0 version.
  4. react-qr-code 1.8.0 version


Using this solution, we are able to create QR Code using React with simple steps. This process also facilities an easy way to use, hassle-free method to create a hands-on working version of code which would help us to create QR Code using React.

Dependent Libraries

create-react-appby facebook

JavaScript doticonstar image 100082 doticonVersion:v5.0.1doticon
License: Permissive (MIT)

Set up a modern web app by running one command.

Support
    Quality
      Security
        License
          Reuse

            create-react-appby facebook

            JavaScript doticon star image 100082 doticonVersion:v5.0.1doticon License: Permissive (MIT)

            Set up a modern web app by running one command.
            Support
              Quality
                Security
                  License
                    Reuse

                      You can search for any dependent library on kandi like 'react'.

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