React hooks for generating QR code

next-qrcode

React hooks for generating QR code for your next React apps.

? Features

• Render as Canvas & Image
• Support Numeric, Alphanumeric, Kanji and Byte mode
• Support Japanese, Chinese, Greek and Cyrillic characters
• Support multibyte characters (like emojis smile)

? Install

next-qrcode is available on npm. It can be installed with the following command:

npm install next-qrcode --save

next-qrcode is available on yarn as well. It can be installed with the following command:

yarn add next-qrcode

? Canvas

usage

import React from 'react';
import { useQRCode } from 'next-qrcode';

function App() {
  const { inputRef } = useQRCode<HTMLCanvasElement>({
    text: 'https://github.com/bunlong/next-qrcode',
    options: {
      level: 'M',
      margin: 7,
      scale: 1,
      width: 200,
      color: {
        dark: '#010599FF',
        light: '#FFBF60FF',
      },
    },
  });
  
  return <canvas ref={inputRef} />;
};

export default App;

parameters

Prop	Type	Require	Description
text	string	✔️	Text/URL to encode.
options	options	❌	QR code options.

options

Prop	Type	Default	Require	Description
level	string	M	❌	Correction level. Possible values are low, medium, quartile, high or L, M, Q, H.
margin	number	4	❌	Define how much wide the quiet zone should be.
scale	number	4	❌	Scale factor. A value of 1 means 1px per modules (black dots).
width	number	4	❌	Forces a specific width for the output image. If width is too small to contain the qr symbol, this option will be ignored. Takes precedence over scale.
color.dark	string	#000000ff	❌	Color of dark module. Value must be in hex format (RGBA). Note: dark color should always be darker than color.light.
color.light	string	#ffffffff	❌	Color of light module. Value must be in hex format (RGBA).

? Image

usage

import React from 'react';
import { useQRCode } from 'next-qrcode';

function App() {
  const { inputRef } = useQRCode<HTMLImageElement>({
    text: 'https://github.com/bunlong/next-qrcode',
    options: {
      type: 'image/jpeg',
      quality: 0.3,
      level: 'M',
      margin: 3,
      scale: 4,
      width: 200,
      color: {
        dark: '#010599FF',
        light: '#FFBF60FF',
      },
    },
  });
  
  return <img ref={inputRef} />;
};

export default App;

parameters

Prop	Type	Require	Description
text	string	✔️	Text/URL to encode.
options	object	❌	QR code options

options

Prop	Type	Default	Require	Description
type	string (image/png, image/jpeg, image/webp)	image/png	❌	Image format.
quality	number	0.92	❌	A Number between 0 and 1 indicating image quality if the type is image/jpeg or image/webp.
level	string	M	❌	Correction level. Possible values are low, medium, quartile, high or L, M, Q, H.
margin	number	4	❌	Define how much wide the quiet zone should be.
scale	number	4	❌	Scale factor. A value of 1 means 1px per modules (black dots).
width	number	4	❌	Forces a specific width for the output image. If width is too small to contain the qr symbol, this option will be ignored. Takes precedence over scale.
color.dark	string	#000000ff	❌	Color of dark module. Value must be in hex format (RGBA). Note: dark color should always be darker than color.light.
color.light	string	#ffffffff	❌	Color of light module. Value must be in hex format (RGBA).

? Wrap Up

If you think any of the next-qrcode can be improved, please do open a PR with any updates and submit any issues. Also, I will continue to improve this, so you might want to watch/star this repository to revisit.