PrintHub

PrintHub is a JavaScript plugin for printing text using a Bluetooth or USB thermal printer. Demo: PrintHub Demo

Features

Print QR Code - Generate and print QR codes for payments (QRIS), URLs, tracking, and more. 🆕
Print Barcode - Generate and print barcodes in various formats (CODE128, EAN13, UPC, etc). 🆕
Print Image from URL with alignment option.
Print text with various options like bold, underline, alignment, and text size.
Print text in two columns.
Print dashed lines.
Print line breaks.
Supports two paper sizes: "58mm" and "80mm".
Supports connecting to Bluetooth thermal printers.
Supports connecting to USB thermal printers.
Compatible with modern browsers such as Chrome, Firefox, and Edge.
Node.js compatible.
Supports usage via CDN.
Supports usage via NPM.
ES6 compatible.

Installation

Using NPM

npm install printhub

Import or require PrintHub into your project.

import PrintHub from "printhub";

or

const PrintHub = require("printhub");

Using CDN

<script src="https://cdn.jsdelivr.net/npm/printhub@latest/dist/index.global.js"></script>

Or use specific version:

<script src="https://cdn.jsdelivr.net/npm/printhub@1.2.1/dist/index.global.js"></script>

Usage

You can create an instance of PrintHub with or without specifying the desired paper size. Supported paper sizes are "58" and "80". If the paper size is not specified, the default is "58".

Creating a PrintHub Instance from NPM

Creating a PrintHub instance with "80" paper size

import PrintHub from "printhub";

let printer = new PrintHub();

or

import PrintHub from "printhub";

let printer = new PrintHub({
  paperSize: "80",
});

Creating a PrintHub Instance from CDN

Creating a PrintHub instance with "80" paper size

let printer = new PrintHub.init({
  paperSize: "80",
});

Creating a PrintHub instance with "58" paper size

let printer = new PrintHub.init();

or you can use the default paper size

let printer = new PrintHub.init({
  paperSize: "58",
});

Selecting Printer Type

You can select the type of printer to use. Supported types are bluetooth and usb. If the printer type is not specified, the default is bluetooth.

NPM Usage

let printer = new PrintHub({
  printerType: "usb",
});

CDN Usage

let printer = new PrintHub.init({
  printerType: "usb",
});

Connecting to Printer and Printing Text

Use the connectToPrint method to connect to a Bluetooth printer and print text. You need to provide two callback functions: onReady and onFailed.

Callback	Description
`onReady`	Called when the printer connection is successful. You can use the print object passed to this callback to print text.
`onFailed`	Called when the printer connection fails. You can use the message parameter to get the error message.

How to Use PrintHub

Connect to the printer and print text.

printer.connectToPrint({
  onReady: async (print) => {
    await print.writeText("Hello, World!");
  },
  onFailed: (message) => {
    console.log(message);
  },
});

Print bold text.

printer.connectToPrint({
  onReady: async (print) => {
    await print.writeText("Hello, World!", { bold: true });
  },
  onFailed: (message) => {
    console.log(message);
  },
});

Print underlined text.

printer.connectToPrint({
  onReady: async (print) => {
    await print.writeText("Hello, World!", { underline: true });
  },
  onFailed: (message) => {
    console.log(message);
  },
});

Print text with alignment.

printer.connectToPrint({
  onReady: async (print) => {
    await print.writeText("Hello, World!", { align: "center" });
  },
  onFailed: (message) => {
    console.log(message);
  },
});

Print text with a specific size.

printer.connectToPrint({
  onReady: async (print) => {
    await print.writeText("Hello, World!", { size: "double" });
  },
  onFailed: (message) => {
    console.log(message);
  },
});

Print text in two columns.

printer.connectToPrint({
  onReady: async (print) => {
    await print.writeTextWith2Column("Name", "John Doe");
  },
  onFailed: (message) => {
    console.log(message);
  },
});

Print dashed lines.

printer.connectToPrint({
  onReady: async (print) => {
    await print.writeDashLine();
  },
  onFailed: (message) => {
    console.log(message);
  },
});

Print line breaks.

printer.connectToPrint({
  onReady: async (print) => {
    await print.writeLineBreak();
  },
  onFailed: (message) => {
    console.log(message);
  },
});

Print text with multiple options.

printer.connectToPrint({
  onReady: async (print) => {
    await print.writeText("Hello, World!", {
      bold: true,
      underline: true,
      align: "center",
      size: "double",
    });
  },
  onFailed: (message) => {
    console.log(message);
  },
});

Print text with multiple options in two columns.

printer.connectToPrint({
  onReady: async (print) => {
    await print.writeTextWith2Column("Name", "John Doe", {
      bold: true,
      underline: true,
      align: "center",
      size: "double",
    });
  },
  onFailed: (message) => {
    console.log(message);
  },
});

Print an image from a URL.

printer.connectToPrint({
  onReady: async (print) => {
    await print.putImageWithUrl("https://example.com/image.png", {
      align: "center",
    });
  },
  onFailed: (message) => {
    console.log(message);
  },
});

Print QR Code 🆕

Print QR codes for payment (QRIS), URLs, tracking numbers, or any data. Perfect for modern receipts!

printer.connectToPrint({
  onReady: async (print) => {
    // Simple QR Code
    await print.printQRCode("https://example.com");

    // QR Code with options
    await print.printQRCode("https://example.com/payment", {
      size: "large", // "small", "medium", "large"
      align: "center", // "left", "center", "right"
      errorCorrection: "M", // "L", "M", "Q", "H"
    });
  },
  onFailed: (message) => {
    console.log(message);
  },
});

Example: Receipt with QRIS Payment

printer.connectToPrint({
  onReady: async (print) => {
    // Header
    await print.writeText("TOKO SAYA", {
      align: "center",
      bold: true,
      size: "double",
    });
    await print.writeDashLine();

    // Items
    await print.writeTextWith2Column("Nasi Goreng", "Rp 25.000");
    await print.writeTextWith2Column("Es Teh", "Rp 5.000");
    await print.writeDashLine();

    // Total
    await print.writeTextWith2Column("TOTAL", "Rp 30.000", { bold: true });
    await print.writeDashLine();

    // QR Code for payment
    await print.writeText("SCAN UNTUK BAYAR", {
      align: "center",
      bold: true,
    });
    await print.writeLineBreak();

    await print.printQRCode(qrisData, {
      size: "large",
      align: "center",
      errorCorrection: "M",
    });

    await print.writeLineBreak({ count: 3 });
  },
  onFailed: (message) => {
    console.log(message);
  },
});

QR Code Sizes:

small: 100x100 pixels - Good for URLs and simple data
medium: 200x200 pixels (default) - Recommended for most use cases
large: 300x300 pixels - Best for payment QR (QRIS, GoPay, OVO, etc.)

Error Correction Levels:

L: ~7% recovery - Clean environments
M: ~15% recovery (default) - Normal use, recommended
Q: ~25% recovery - Outdoor use
H: ~30% recovery - Critical data

For more details, see QR Code Guide.

Print Barcode 🆕

Print barcodes in various formats for products, invoices, tickets, and inventory management.

✨ v1.2.1 Improvements: Barcode now prints in full width with proper aspect ratio and is scannable!

printer.connectToPrint({
  onReady: async (print) => {
    // Simple barcode
    await print.printBarcode("1234567890");

    // Barcode with options
    await print.printBarcode("5901234123457", {
      format: "EAN13", // Barcode format
      width: 2, // Line width (1-4)
      height: 60, // Height in pixels (default: 60)
      displayValue: true, // Show text below barcode
      align: "center", // Alignment
    });
  },
  onFailed: (message) => {
    console.log(message);
  },
});

Example: Invoice with Barcode

printer.connectToPrint({
  onReady: async (print) => {
    // Header
    await print.writeText("INVOICE", {
      align: "center",
      bold: true,
      size: "double",
    });
    await print.writeDashLine();

    // Invoice Info
    await print.writeTextWith2Column("No Invoice", "INV-001");
    await print.writeTextWith2Column("Tanggal", "06/10/2024");
    await print.writeDashLine();

    // Items
    await print.writeTextWith2Column("Product A", "Rp 50.000");
    await print.writeTextWith2Column("Product B", "Rp 30.000");
    await print.writeDashLine();

    // Total
    await print.writeTextWith2Column("TOTAL", "Rp 80.000", { bold: true });
    await print.writeDashLine();

    // Barcode for tracking
    await print.writeText("Scan untuk tracking:", {
      align: "center",
      bold: true,
    });
    await print.writeLineBreak();

    await print.printBarcode("INV001", {
      format: "CODE128",
      width: 2,
      height: 50,
      displayValue: true,
      align: "center",
    });

    await print.writeLineBreak({ count: 3 });
  },
  onFailed: (message) => {
    console.log(message);
  },
});

Supported Barcode Formats:

CODE128 (default) - Most versatile, alphanumeric
CODE39 - Alphanumeric, widely used
EAN13 - 13-digit product barcodes (e.g., 5901234123457)
EAN8 - 8-digit product barcodes
UPC - Universal Product Code
ITF14 - 14-digit shipping container codes
MSI - Modified Plessey, inventory management
pharmacode - Pharmaceutical packaging
codabar - Libraries, blood banks, logistics

Barcode Options:

format: Barcode type (default: "CODE128")
width: Line width, 1-4 (default: 2)
height: Height in pixels (default: 50)
displayValue: Show text below barcode (default: true)
align: Alignment - "left", "center", "right" (default: "center")

For more details, see Barcode Status.

API

Method	Description
`writeLineBreak({ count = 1 })`	Writes a line break.
`writeDashLine()`	Writes a dashed line.
`writeTextWith2Column(text1, text2, options)`	Writes text in two columns.
`writeText(text, options)`	Writes text.
`connectToPrint({ onReady, onFailed })`	Connects to the printer and calls the `onReady` or `onFailed` callback.
`putImageWithUrl(url, options)`	Prints an image from a URL.
`printQRCode(text, options)` 🆕	Generates and prints a QR code.
`printBarcode(text, options)` 🆕	Generates and prints a barcode.

Options for `printQRCode` Method 🆕

Option	Type	Description	Default
`size`	string	QR Code size: "small" (100px), "medium" (200px), "large" (300px)	`"medium"`
`align`	string	Alignment: "left", "center", "right"	`"center"`
`errorCorrection`	string	Error correction level: "L", "M", "Q", "H"	`"M"`
`onFailed`	function	Callback function when QR code generation fails	-

Options for `printBarcode` Method 🆕

Option	Type	Description	Default
`format`	string	Barcode format: "CODE128", "CODE39", "EAN13", "EAN8", "UPC", etc	`"CODE128"`
`width`	number	Line width (1-4)	`2`
`height`	number	Height in pixels	`50`
`displayValue`	boolean	Show text below barcode	`true`
`align`	string	Alignment: "left", "center", "right"	`"center"`
`onFailed`	function	Callback function when barcode generation fails	-

Options for `writeText` and `writeTextWith2Column` Methods

Option	Description	Default
`bold`	Specifies whether the text is printed in bold.	`false`
`underline`	Specifies whether the text is printed with an underline.	`false`
`align`	Specifies text alignment. Supported values: "left", "center", "right".	`left`
`size`	Specifies the text size. Supported values: "normal", "double".	`normal`

Use Cases

PrintHub is perfect for various business needs:

🛒 Retail & E-commerce

Print receipts with QRIS payment QR codes
Product labels with barcodes (EAN13, UPC)
Order tracking QR codes for customers
Product information and pricing labels
Inventory management with barcode scanning

🍽️ Restaurant & F&B

Kitchen orders and bills
Table receipts with payment QR (QRIS, GoPay, OVO)
Customer feedback survey QR codes
Digital menu QR codes
Order number tickets

🎫 Events & Ticketing

E-tickets with QR codes for validation
Event passes with barcodes
Queue management tickets
Access control
Ticket verification systems

🏪 Point of Sale (POS)

Sales receipts with payment options
Product barcodes for inventory
Customer loyalty program QR codes
Promotional coupons
Store information and social media QR codes

📦 Logistics & Shipping

Shipping labels with tracking barcodes (CODE128)
Package tracking QR codes
Delivery receipts
Warehouse management
Inventory tracking

Tips for Best Results

For QR Codes

Use large size for payment QR codes (QRIS) for easy scanning
Use medium size for URLs and general purpose
Use small size when space is limited
Always use center alignment for better scanning
For payment QR, use error correction level M or Q
Add descriptive text above/below the QR code

For Barcodes

Use CODE128 for alphanumeric data (invoices, tracking)
Use EAN13 or UPC for product barcodes (must be valid format)
Use CODE39 for simple alphanumeric needs
Set displayValue: true to show the barcode text
Use center alignment for better scanning
Recommended height: 60-80 pixels for good readability (default is 60px)
Keep width at 2 for standard printers
Ensure good contrast (dark barcode on light background)
New in v1.2.1: Barcode automatically adjusts to paper size
- 58mm paper: Up to 380 pixels wide
- 80mm paper: Up to 570 pixels wide
Barcode maintains proper aspect ratio for accurate scanning

For Images

Use high contrast images (black & white works best)
Recommended max size: 120x120 pixels
Use PNG or JPG format
Ensure good lighting for best print quality

For Text Printing

Use bold for important information (totals, headers)
Use double size for emphasis (store name, total amount)
Use center alignment for headers and important messages
Use two columns for item-price pairs
Add line breaks for better readability

Requirements for USB Printer

Windows

Install Zadig.
Connect the USB Printer to your computer.
Open Zadig and select your USB Printer.
Install the WinUSB driver for your USB Printer.
Done.

Linux

Connect the USB Printer to your computer.
Open the terminal and run lsusb.
Find your USB Printer and note the vendor id and product id.
Run sudo modprobe usblp.
Run sudo echo "ATTRS{idVendor}=="YOUR_VENDOR_ID", ATTRS{idProduct}=="YOUR_PRODUCT_ID", MODE="0666", GROUP="plugdev" > /etc/udev/rules.d/99-usb-printer.rules.
Run sudo udevadm control --reload-rules.
Run sudo udevadm trigger.
Done.

macOS

Connect the USB Printer to your computer.
Open the terminal and run ls /dev/cu.*.
Find your USB Printer and note the device name.
Run `sudo chmod
Run `sudo chown
Done.

Browser Support

Desktop

Browser	Version	Status
Chrome	61	✔️
Firefox	No	❌
Edge	79	✔️
Safari	No	❌
Opera	48	✔️

Mobile

Browser	Version	Status
Chrome	61	✔️
Firefox	No	❌
Safari	No	❌
Opera	45	✔️
Samsung	8.0	✔️
WebView	No	❌

Change Log

v1.2.1 🔧

BUGFIX: Fixed barcode printing quality issues
Barcode now prints in full width based on paper size (58mm: 380px, 80mm: 570px)
Fixed aspect ratio distortion - barcode no longer prints as square box
Improved barcode rendering quality with dedicated printBarcodeImage() method
Increased default barcode height from 50px to 60px for better readability
Barcode now scannable with standard barcode scanners
Added smart scaling to prevent barcode from exceeding paper width
Optimized ESC/POS image commands for better print quality

v1.2.0

NEW FEATURE: printBarcode() - Generate and print barcodes in 9 different formats
Support for CODE128, CODE39, EAN13, EAN8, UPC, ITF14, MSI, pharmacode, and codabar
Customizable barcode width, height, and display options
Perfect for product labels, inventory management, invoices, and tickets
Added comprehensive barcode documentation
See Barcode Status for implementation details

v1.1.0

NEW FEATURE: printQRCode() - Generate and print QR codes for payments, URLs, tracking, and more
Added support for 3 QR code sizes (small, medium, large)
Added support for 4 error correction levels (L, M, Q, H)
Perfect for QRIS payment, e-commerce tracking, feedback surveys, and more
Optimized browser build (reduced bundle size by ~50%)
Improved browser compatibility for bundling
Added comprehensive QR Code guide documentation
See QR Code Guide for complete usage examples

v1.0.15

Now supports to print image from URL (putImageWithUrl) with alignment option
Refactor printing methods for USB and Bluetooth
Improve error handling and add image printing functionality
Fix minor bugs

v1.0.14

Update README.md

v1.0.13

Add support for Node.js (typescript, es6, commonjs)
Change the way to use instance of PrintHub

v1.0.7

Fix writeTextWith2Column method if length of text1 + text2 is greater than 32 or 42 characters

v1.0.6

Remove unused code

v1.0.5

Update paper size from "58mm" and "80mm" to "58" and "80"

v1.0.4

Added instructions for USB Printer on Windows, Linux, and macOS

v1.0.3

Fixed USB Printer not working

Documentation

Complete Usage Guide - Comprehensive guide with examples for all features
QR Code Guide - Detailed guide for QR code printing with real-world examples
Barcode Status - Barcode implementation details and troubleshooting
Feature Ideas - Upcoming features and roadmap

Contributing

Contributions are welcome! Please feel free to submit a Pull Request.

Fork the repository
Create your feature branch (git checkout -b feature/AmazingFeature)
Commit your changes (git commit -m 'Add some AmazingFeature')
Push to the branch (git push origin feature/AmazingFeature)
Open a Pull Request

License

This project is licensed under the ISC License.

Support

If you encounter any issues or have questions:

Open an issue on GitHub Issues
Check the documentation
See examples in the demo

Acknowledgments

QR Code generation powered by qrcode
Built with TypeScript and modern JavaScript

Made with ❤️ by Dede Fuji Abdul

Star ⭐ this repository if you find it helpful!

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