react-qrcode-logo

react-qrcode-logo

Typescript React component to generate a customizable QR Code.

Installation

npm install --save react-qrcode-logo

Usage

// import
import { QRCode } from 'react-qrcode-logo';

// usage
<QRCode value="https://github.com/gcoro/react-qrcode-logo" />

Compatibility

If you are using a React version >= 18, use react-qrcode-logo version >= 3.0.0

Props

Prop	Type	Default value	Description
value	string	https://reactjs.org/	The value encoded in the QR Code. When the QR Code is decoded, this value will be returned
ecLevel	L | M | Q | H	M	The error correction level of the QR Code
enableCORS	boolean	false	Enable crossorigin attribute
size	number (in pixels)	150	The size of the QR Code
quietZone	number (in pixels)	10	The size of the quiet zone around the QR Code. This will have the same color as QR Code bgColor
bgColor	string (css color)	#FFFFFF	Background color
fgColor	string (css color)	#000000	Foreground color
logoImage	string (src attribute)		The logo image. It can be a url/path or a base64 value
logoWidth	number (in pixels)	size * 0.2	Logo image width
logoHeight	number (in pixels)	logoWidth	Logo image height
logoOpacity	number (css opacity 0 <= x <= 1)	1	Logo opacity. This allows you to modify the transparency of your logo, so that it won't compromise the readability of the QR Code
removeQrCodeBehindLogo	boolean	false	Removes points behind the logo. If no logoPadding is specified, the removed part will have the same size as the logo
logoPadding	number		Adds a border with no points around the logo. When > 0, the padding will be visible even if the prop removeQrCodeBehindLogo is not set to true
logoPaddingStyle	square | circle	square	Sets the shape of the padding area around the logo
qrStyle	squares | dots | fluid	squares	Style of the QR Code modules
eyeRadius	CornerRadii | CornerRadii[]		The corner radius for the positional patterns (the three "eyes" around the QR code). See more details here
eyeColor	EyeColor | EyeColor[]		The color for the positional patterns (the three "eyes" around the QR code). See more details here
id	string	react-qrcode-logo	Optional custom id for the QRCode canvas. You can use this prop if you have multiple QRCodes and need to differentiate them
style	React.CSSProperties		CSS style properties that will be applied to the canvas component

Events

Event Name	Returns	Description
logoOnLoad	event: Event	Event that fires when the QR Code logo image has been loaded

Methods

Methods must be called on a valid QRCode ref - learn more.

Method Name	Arguments	Description
download	fileType?: 'png' | 'jpg' | 'webp', fileName?: string	This function will download the QR Code as image. Format and file name can be specified

Example

You can find a demo project here.

Contributing

PRs and suggestions are welcome. When making a pull request, please explain in a clear way the changes you made and why you are making them (+ if you can also update the README accordingly, ty <3). Also try keep the current repo codestyle (eg. do not reformat all the code with prettier).

Thanks to everyone who contributed and/or will contribute :)

More credits

This package was inspired by cssivision/qrcode-react and zpao/qrcode.react. Also looked up some parts from kazuhikoarase/qrcode-generator (which this package depends on).

Changelog

[v3.0.0]

Fixes

• Removed use of ReactDOM.findDOMNode, which has been deprecated in React 18, and removed in React 19.

Features

• Added download function to save the QRCode as image.
• Added optional style prop to pass CSS to the canvas.
• logoOnLoad callback now also returns the event details.