Grocery / restaurant POS
80mm demo; zero margins.
Retail POS thermal receipt silent print
80mm thermal receipts for retail/POS without dialogs. HTML + printHtml—see also receipts guide.
Print architecture
POS web UI → printHtml → local client → thermal printer.
Typical scenarios
Preview then silent
Use preview action for tuning.
Win tills + Mac back office
Same npm API, different installers.
Integration steps
- Install client on till PC
- Fix HTML to 80mm width
- Set printerName
- getConnectStatus before print
80mm receipt parameters
await webPrintPdf.printHtml(
receiptHtml,
{ width: '80mm', height: '120mm', printBackground: true },
{ printerName: '热敏打印机', copies: 1 }
);Parameter tips
- 80mm width in pdfOptions
- formatPrintError for UX
Selection notes
window.print shows a dialog—use client silent print for POS.
Troubleshooting
- Blank pages → zero margins
- Tiny text → test px/pt on device
Related guides on this site
FAQ
Silent in POS browser?
Yes—with desktop client + web-print-pdf.
Pick USB thermal printer?
printOptions.printerName from client list.
Offline till?
getConnectStatus; queue reprint when client returns.
vs ESC/POS?
HTML layouts are easier to maintain.
UniApp POS H5?
H5 on PC browser works; mini programs cannot reach desktop client.
Client deployment by platform
The same web-print-pdf front-end runs on Windows, macOS, and Linux/domestic OS—install the matching client on each desktop.