### Example ESC/POS Printing with JavaScript

Source: https://github.com/node-escpos/driver/blob/main/README.md

This JavaScript code snippet demonstrates how to connect to a USB ESC/POS printer using the @node-escpos/usb-adapter and @node-escpos/core libraries. It shows how to initialize the printer, set encoding options, print formatted text, generate EAN13 barcodes, create custom tables, embed QR codes from URLs, and print images. The example handles device opening errors and ensures the printer cuts the paper and closes the connection after printing.

```javascript
import { Printer, Image } from "@node-escpos/core";
// install escpos-usb adapter module manually
import USB from "@node-escpos/usb-adapter";
// Select the adapter based on your printer type
import { join } from "path";

const device = new USB();

device.open(async function(err){
  if(err){
    // handle error
    return
  }

  // encoding is optional
  const options = { encoding: "GB18030" /* default */ }
  let printer = new Printer(device, options);

  // Path to png image
  const filePath = join("/PATH/TO/IMAGE");
  const image = await Image.load(filePath);

  printer
    .font("a")
    .align("ct")
    .style("bu")
    .size(1, 1)
    .text("May the gold fill your pocket")
    .text("恭喜发财")
    .barcode(112233445566, "EAN13", { width: 50, height: 50 })
    .table(["One", "Two", "Three"])
    .tableCustom(
      [
        { text: "Left", align: "LEFT", width: 0.33, style: "B" },
        { text: "Center", align: "CENTER", width: 0.33 },
        { text: "Right", align: "RIGHT", width: 0.33 }
      ],
      { encoding: "cp857", size: [1, 1] } // Optional
    )
    
  // inject qrimage to printer
  printer = await printer.qrimage("https://github.com/node-escpos/driver")
  // inject image to printer
  printer = await printer.image(
    image, 
    "s8" // changing with image
  )

  printer
    .cut()
    .close()
});
```

--------------------------------

### HTML+CSS Receipt Printing Workflow

Source: https://github.com/node-escpos/driver/blob/main/README.md

Illustrates a proposed workflow for printing receipts using HTML and CSS for content customization. The process involves defining the HTML structure, capturing it as an image, and then sending the image to an ESC/POS printer for physical output.

```tsx
<div id="label-dom"> Label/Receipt </div>
```

```tsx
const screenshort = await capture(document.getElementByID("label-dom"))
```

```tsx
const printer = await printer.image(screenshort, "s8")
printer.cut().close()
```

--------------------------------

### Send Print Job to ESC POS Server (JavaScript)

Source: https://github.com/node-escpos/driver/blob/main/examples/web/client.html

This JavaScript function handles sending text content to an ESC POS server for printing. It prevents default form submission, retrieves the server URL and text from input fields, and uses Axios to make a POST request to the server's '/print' endpoint. It then alerts the user with the server's response or any errors encountered during the request.

```JavaScript
function handlePrint() {
  event.preventDefault();
  server = document.getElementById("server").value;
  text = document.getElementById("text").value;
  axios.post(`${server}/print`, { "text": text })
    .then(function (response) {
      alert(response.data.status);
    })
    .catch(function (error) {
      alert(error);
    });
}
```

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