ESC/POS Printer Library
Library to generate buffer for thermal printers.
Install
Run command bellow on your project folder
yarn add escpos-buffer
or
npm install escpos-buffer
Basic example
const { Printer, Style, Align, Drawer, Model, InMemory } = require('escpos-buffer')
const model = new Model('MP-4200 TH')
const connection = new InMemory()
const printer = new Printer(model, connection)
printer.columns = 56
printer.write('Simple Text *** ')
printer.writeln('Bold Text -> complete line text.[]123456', Style.Bold)
printer.writeln('Double height', Style.DoubleHeight | Style.Bold, Align.Center)
printer.writeln('Áçênts R$ 5,00', Style.DoubleWidth | Style.DoubleWidth, Align.Center)
printer.feed(6)
printer.buzzer()
printer.cutter()
printer.drawer(Drawer.First)
process.stdout.write(connection.buffer())
Usage in the browser
You can also use the new WebUSB protocol in Chrome to connect directly to the printer.
import { Printer, Model, WebUSB } from 'escpos-buffer'
const device = await navigator.usb.requestDevice({
filters: [{
vendorId: VENDOR_ID
}]
})
const model = new Model('TM-T20')
const connection = new WebUSB(device)
await connection.open()
const printer = new Printer(model, connection)
Available scripts
clean
- remove coverage data, Jest cache and transpiled files,build
- transpile TypeScript to ES6,build:watch
- interactive watch mode to automatically transpile source files,lint
- lint source files and tests,style:fix
- fix prettier style problems,style:check
- check for prettier style,test
- run tests,test:watch
- interactive watch mode to automatically re-run teststest:debug
- run tests debugging
License
Licensed under the MIT. See the LICENSE file for details.