jodusnodus / react-qr-reader

React component for reading QR codes from webcam.

React QR Reader

🚀 React QR Reader component. Check out the demo.

Table of contents

• Use Case
• Compatibility
• Installation
  • NPM
  • YARN
• Example Usage
• QrReader API
• Browser support
• Issues
• Contributing
• License

Use Case

You need a component for Scanning QR codes from a web browser based app.

Compatibility

This component has been tested in the following browsers:

• Chrome Mac OS & Android
• Firefox Mac OS & Android
• Safari Mac OS & IOS

Since this library does internal use of hooks you need React >= 16.8.0.

Installation

You can install this library via NPM or YARN.

NPM

npm i react-qr-reader

YARN

yarn add react-qr-reader

Example Usage

After reading and performing the previous steps, you should be able to import the library and use it like in this example:

import React, { useState } from 'react';
import { QrReader } from 'react-qr-reader';

const Test = (props) => {
  const [data, setData] = useState('No result');

  return (
    <>
      <QrReader
        onResult={(result, error) => {
          if (!!result) {
            setData(result?.text);
          }

          if (!!error) {
            console.info(error);
          }
        }}
        style={{ width: '100%' }}
      />
      <p>{data}</p>
    </>
  );
};

Component API

The QrReader component has the following props:

Properties	Types	Default Value	Description
constraints	MediaTrackConstraints	{ facingMode: 'user' }	Specify which camera should be used (if available).
onResult	function	none	Scan event handler
videoId	string	video	The ID for the video element
scanDelay	number	500	The scan period for the QR hook
ViewFinder	component	none	ViewFinder component to rendering over the video element
className	string	none	ClassName for the container element.
containerStyle	object	none	Style object for the container element.
videoContainerStyle	object	none	Style object for the video container element.
videoStyle	object	none	Style object for the video element.

Maintainers

• Created by @JodusNodus .
• Revived thanks to @JonatanSalas and his company @BlackBoxVision .

Browser Support

If you need to support older browsers, checkout this guide in how to make it compatible with legacy ones

Issues

Please, open an issue following one of the issues templates. We will do our best to fix them.

Contributing

If you want to contribute to this project see contributing for more information.

License

Distributed under the MIT license. See LICENSE for more information.