io-barcode

io-barcode is a simple way to create different types of barcodes on server or client.

This started as a fork of the Johan Lindell's JsBarcode project. It adds the following functionality:

1. Isomorphic barcode generation on client and server.
2. Node support through node-canvas.
3. Packaged with UMD support on client side.
4. Modular design.
5. Returns a canvas element.
6. Removed direct jQuery integration.
7. Custom label support (Instead of the encoded data string).

Demo and examples

Barcode Generator

Supported barcodes

• CODE128 (B or C)
• EAN (13)
• UPC-A
• CODE39
• ITF (Interleaved 2 of 5)
• ITF14
• Pharmacode

Installation

With npm:

npm install io-barcode

If you are not using Node, browserify, webpack or similar npm-based systems, download the minified UMD bundle for browsers only.

Usage

ioBarcode.TYPE(code, opts)

Create a new barcode. Returns a canvas element.

• TYPE - the type of barcode, can be:
  • CODE128B
  • CODE128C
  • EAN
  • UPC
  • CODE39
  • ITF
  • ITF14
  • Pharmacode
• code - the string to encode
• opts - additional formatting, default options are:

{
  width:  2,
  height: 100,
  quite: 10,
  displayValue: false, // Will display the encoded data as a label, or 'customLabel' if not null
  font: 'monospace',
  textAlign: 'center',
  fontSize: 12,
  fontWeight: 'bold',
  backgroundColor: '',
  lineColor: "#000",
  customLabel:null, // Will be displayed if displayValue is set to true
}

Example on server side:

  var fs = require('fs')
  var ioBarcode = require("io-barcode")
  var canvas = ioBarcode.CODE128B('Javascript is fun!', {
    width: 1,
    height: 25
  })
  var stream = canvas.pngStream()
  stream.pipe(fs.createWriteStream('./barcode.png'))

Example on the client side:

  // If using a require system like browserify or webpack just require it
  var ioBarcode = require("io-barcode")
  // If using UMD bundle via a <script> tag, ioBarcode is exposed as a global
  var canvas = ioBarcode.CODE128B('Javascript is fun!', {
    width: 1,
    height: 25
  })

  // Render the canvas directly
  document.body.appendChild(canvas)

  // Or in an image tag
  var img = new Image()
  img.src = canvas.toDataURL('image/png')
  document.body.appendChild(img)

Running tests

Run npm test and visit http://localhost:3000 in your favorite browser.