react-scan-qr-code

React QR Code Scanner

Table of contents

• Use Case
• Compatibility
• Installation
  • NPM
  • YARN
• Example Usage
• QrCode Scanner API
• License

Use Case

You need a scanner 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-code-scanner

YARN

yarn add react-qr-code-scanner

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 { QrScanner } from 'react-qr-code-scanner';

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

  return (
    <>
      <QrScanner
        onsuccess={(result, error) => {
          if (!!result) {
            setData(result);
          }

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

Component API

The QrCodeScanner component has the following props:

Properties	Types	Default Value	Description
constraints	MediaTrackConstraints	{ facingMode: 'user' }	Specify which camera should be used (if available).
onSuccess	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.

License

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