JavaScript QRCode reader for HTML5 enabled browser.

This is a port of Lazarsoft’s qrcode reader

Installation

npm install qrcode-reader

Usage

QrCode=require(‘qrcode-reader’);

Create a new instance of QrCode:

qr= new QrCode();

Set it's callback to a custom function

qr.callback= function(result){alert(result)}

Decode an image by it's URL or Data URI:

qr.decode(url or DataURL);

Decode an image by context.getImageData: Works with web workers.

var context = canvas.getContext("2d");
var data = context.getImageData(0, 0, width, height);

qr.decode(data);

Decode from canvas with "qr-canvas" ID:

qr.decode()

Building it yourself

If you want, you can build the script yourself.

First clone the repository, then from the directory of this repository, do :

npm install
gulp compile

You will have one jsfile called index.js that you can run from node.

You can then run the tests by running

npm test

Make it work in the browser

After building yourself the script index.js, you can do :

npm install --global browserify
browserify -o qrcode.js -s QrCode index.js

This way if you do in your HTML :

<script src="qrcode.js"></script>
you will have access to the global variable `QrCode`