react-qrcodes

react-qrcodes

React hooks for generating QR code.

🎁 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)

Live Demo

🔧 Install

react-qrcodes is available on npm. It can be installed with the following command:

npm install react-qrcodes --save

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

yarn add react-qrcodes

💡 Canvas

usage

import React from 'react';
import { useQRCode } from 'react-qrcodes';

function App() {
  const [inputRef] = useQRCode({
    text: 'https://github.com/bunlong/react-qrcodes',
    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 'react-qrcodes';

function App() {
  const [inputRef] = useQRCode({
    text: 'https://github.com/bunlong/react-qrcodes',
    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 react-qrcodes 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.

🌟 Contribution

We'd love to have your helping hand on contributions to react-qrcodes by forking and sending a pull request!

Your contributions are heartily ♡ welcome, recognized and appreciated. (✿◠‿◠)

How to contribute:

• Open pull request with improvements
• Discuss ideas in issues
• Spread the word
• Reach out with any feedback

⚖️ License

The MIT License