QR Code Generator

Getting Started

Include qrcode.js in your html.
Prepare a place holder.
Generate QR and render it.

<script type="text/javascript" src="qrcode.js"></script>

<div id="placeHolder"></div>

var typeNumber = 4;
var errorCorrectionLevel = 'L';
var qr = qrcode(typeNumber, errorCorrectionLevel);
qr.addData('Hi!');
qr.make();
document.getElementById('placeHolder').innerHTML = qr.createImgTag();

API Documentation

QRCodeFactory

qrcode(typeNumber, errorCorrectionLevel) => `QRCode`

Create a QRCode Object.

Param	Type	Description
typeNumber	`number`	Type number (1 ~ 40), or 0 for auto detection.
errorCorrectionLevel	`string`	Error correction level ('L', 'M', 'Q', 'H')

qrcode.stringToBytes(s) : `number[]`

Encodes a string into an array of number(byte) using any charset. This function is used by internal. Overwrite this function to encode using a multibyte charset.

Param	Type	Description
s	`string`	string to encode

QRCode

addData(data, mode) => `void`

Add a data to encode.

Param	Type	Description
data	`string`	string to encode
mode	`string`	Mode ('Numeric', 'Alphanumeric', 'Byte'(default), 'Kanji')

make() => `void`

Make a QR Code.

getModuleCount() => `number`

The number of modules(cells) for each orientation. [Note] call make() before this function.

isDark(row, col) => `boolean`

The module at row and col is dark or not. [Note] call make() before this function.

Param	Type	Description
row	`number`	0 ~ moduleCount - 1
col	`number`	0 ~ moduleCount - 1

createDataURL(cellSize, margin) => `string`

createImgTag(cellSize, margin, alt) => `string`

createSvgTag(cellSize, margin) => `string`

createTableTag(cellSize, margin) => `string`

createASCII(cellSize, margin) => `string`

Helper functions for HTML. [Note] call make() before these functions.

Param	Type	Description
cellSize	`number`	default: 2
margin	`number`	default: cellSize * 4
alt	`string`	(optional)

createSvgTag(opts) => `string`

Param	Type	Description
opts	`object`	default: {}
opts.cellSize	`number`	default: 2
opts.margin	`number`	default: cellSize * 4
opts.scalable	`boolean`	default: false

renderTo2dContext(context, cellSize) => `void`

This implementation is based on JIS X 0510:1999.

The word 'QR Code' is registered trademark of DENSO WAVE INCORPORATED
http://www.denso-wave.com/qrcode/faqpatent-e.html

npm