@devmehq/react-qr-code

Simple & Advanced React component to generate QR codes

Installation

1npm install @devmehq/react-qr-code

1yarn install @devmehq/react-qr-code

Usage

1import React from 'react';
2import { ReactQrCode } from '@devmehq/react-qr-code';
3
4<ReactQrCode value="http://facebook.github.io/react/" />

1var React = require('react');
2var { ReactQrCode } = require('@devmehq/react-qr-code');
3
4<ReactQrCode value="http://facebook.github.io/react/" />

Available Props

prop	type	default value
value	string
renderAs	string ('canvas' 'svg')	'canvas'
size	number	128
bgColor	string (CSS color)	"#FFFFFF"
fgColor	string (CSS color)	"#000000"
level	string ('L' 'M' 'Q' 'H')	'L'
marginSize	number	false
images	array (see below)

imageSettings

field	type	default value
src	string
x	number	none, will center
y	number	none, will center
height	number	10% of size
width	number	10% of size
excavate	boolean	false

Custom Styles

@devmehq/react-qr-code will pass through any additional props to the underlying DOM node (<svg> or <canvas>). This allows the use of inline style or custom className to customize the rendering. One common use would be to support a responsive layout.

Note: In order to render QR Codes in <canvas> on high density displays, we scale the canvas element to contain an appropriate number of pixels and then use inline styles to scale back down. We will merge any additional styles, with custom height and width overriding our own values. This allows scaling to percentages but if scaling beyond the size, you will encounter blurry images. I recommend detecting resizes with something like react-measure to detect and pass the appropriate size when rendering to <canvas>.

TODO

• Add Image Ref
• Add Corner Images and Center Image
• Add Examples to wifi password, 2fa, and other QR codes
• ADD SSR Rendering Support
• Add Download / Share QR Code
• Add Test

LICENSE MIT