katherdx / electron-pos-printer

Electron thermal printer

Electron-pos-printer

An electron printer plugin, currently supports 58mm, requires electron >= 4.x.x.

Installation

$ npm install electron-pos-printer

Usage

In main process

const {PosPrinter} = require("electron-pos-printer");

In render process

const {PosPrinter} = require('electron').remote.require("electron-pos-printer");

Demo

const {PosPrinter} = require("electron-pos-printer");
const path = require("path");

const options = {
   preview: false,               // Preview in window or print
   width: '170px',               //  width of content body
   margin: '0 0 0 0',            // margin of content body
   copies: 1,                    // Number of copies to print
   printerName: 'XP-80C',        // printerName: string, check it at webContent.getPrinters()
   timeOutPerLine: 400
}

const data = [
   {
     type: 'image',                                       
     path: path.join(__dirname, 'assets/banner.png'),     // file path
     position: 'center',                                  // position of image: 'left' | 'center' | 'right'
     width: 60,                                           // width of image in px; default: auto
     height: 60,                                          // width of image in px; default: 50 or '50px'
   },{
      type: 'text',                                       // 'text' | 'barCode' | 'qrCode' | 'image'
      value: 'SAMPLE HEADING',
      style: `text-align:center;`,
      css: {"font-weight": "700", "font-size": "18px"}
   },{
      type: 'text',                       // 'text' | 'barCode' | 'qrCode' | 'image'
      value: 'Secondary text',
      style: `text-align:left;color: red;`,
      css: {"text-decoration": "underline", "font-size": "10px"}
   },{
      type: 'barCode',
      value: 'HB4587896',
      height: 12,                     // height of barcode, applicable only to bar and QR codes
      width: 1,                       // width of barcode, applicable only to bar and QR codes
      displayValue: true,             // Display value below barcode
      fontsize: 8,
   },{
     type: 'qrCode',
      value: 'https://github.com/Hubertformin/electron-pos-printer',
      height: 55,
      width: 55,
      style: 'margin: 10 20px 20 20px'
    }
]

PosPrinter.print(data, options)
 .then(() => {})
 .catch((error) => {
    console.error(error);
  });

Typescript

Usage

import {PosPrinter, PosPrintData, PosPrintOptions} from "electron-pos-printer";
import * as path from "path";

const options: PosPrintOptions = {
   preview: false,
   width: '170px',       
   margin: '0 0 0 0',    
   copies: 1,
   printerName: 'XP-80C',
   timeOutPerLine: 400
}

const data: PosPrintData[] = [
   {
     type: 'image',                               
     path: path.join(__dirname, 'assets/banner.png'),
     position: 'center',
     width: 60,
     height: 60
   },{
      type: 'text',
      value: 'SAMPLE HEADING',
      style: `text-align:center;`,
      css: {"font-weight": "700", "font-size": "18px"}
   },{
      type: 'barCode',
      value: 'HB4587896',
      height: 12,
      width: 1,
      displayValue: true,
      fontsize: 8,
    },{
     type: 'qrCode',
      value: 'https://github.com/Hubertformin/electron-pos-printer',
      height: 55,
      width: 55,
      style: 'text-align:center;width:55px;margin: 10 20px 20 20px'
    }
]

PosPrinter.print(data, options)
 .then(() => {})
 .catch((error) => {
    console.error(error);
  });

Printing options

Options
copies	(number) number of copies to print
preview	(boolean) preview in a window, default is false
width	(string) width of a page
margin	(string) margin of a page, css values can be used
printerName	(string) the printer's name
timeOutPerLine	(number) timeout per line, default is 200

Print data object

type	(string) 'text', 'qrCode', 'barCode', 'image' // type 'text' can contain html
value	(string) value of the current row
height	(number) applicable to type barCode and qrCode
width	(number) applicable to type barCode and qrCode
style	(string) styles, css rules can be used
css	(string) css rules ex: {"font-size": "12px"}
displayValue	(boolean) display value of barcode below barcode
position	(string) 'left', 'center', 'right' applicable to type qrCode, barCode and image
path	(string) Path to the image asset

Author

• Hubert Formin
• [e-mail]
• Twitter: @hformin

Credits

This package was inspired by electron-thermal-printer