node-zbar is a NodeJS binding to the ZBar QR Code library.
npm install zbarnode-zbar is a NodeJS binding to the ZBar QR Code library. Initially this will spawn a child process and monitor the output. But eventually it will be a C++ module.
To use node-zbar, you will install the prerequisite of ZBar.
Compile from source see
http://zbar.sourceforge.net/
Node-zbar can then be installed via NPM
npm install zbar
Then, require the module
var zbar = require('zbar');
zbar.watch(device, [options], listener)
Watch for data on device. device is a path to a supported webcam device. For example /dev/video0
The second argument is optional. The options if provided should be an object. The list of available options are as following:
width - scale the width of the sampled image
height - scale the width of the sampled image
dataType - can be raw or xml. default is raw
The listener callback gets two arguments (error, data). Data is the data returned from a barcode.
Example:
zbar.watch('/dev/video0', function (event) {
console.log('event is: ' + event);
});