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print barcode beta

use

init: init the command
setBarCode: Draw 1D barcode
setPrint: execute print

js

import printease from 'printease'
let zpl = new printease.zpl.ZplLib()
zpl.init() 
zpl.setBarCode(10,10,3,100,'123456')
zpl.setPrint()
console.log(zpl.getBuffer())