# RequestBarcodeAlignmentCallback Function

> Callback function for requesting a barcode alignment value.

- **Product:** DS Server
- **Section:** Reference
- **Kind:** Function
- **Path:** DS Server > Reference > JavaScript API > RequestBarcodeAlignmentCallback Function
- **280 words**
- **Web URL:** https://docs.textcontrol.com/ds-server/reference/javascript/requestbarcodealignmentcallback/
- **LLMs URL:** https://docs.textcontrol.com/ds-server/reference/javascript/requestbarcodealignmentcallback/llms.txt
- **LLMs-Full URL:** https://docs.textcontrol.com/ds-server/reference/javascript/requestbarcodealignmentcallback/llms-full.txt

---

### Description

Callback function for requesting a [barcode alignment](https://docs.textcontrol.com/ds-server/reference/javascript/txtextcontrol/barcodealignment-enumeration/llms-full.txt) value.

### Syntax

```javascript
function(<BarcodeAlignment> alignment)
```

### Examples

The following example demonstrates `RequestBarcodeAlignmentCallback` in a practical document-editing workflow. Callback function for requesting a barcode alignment value.

```javascript
function onTxError(error) {
    console.error("TX Text Control error:", error.msg);
    error.handled = true;
}

function requestBarcodeAlignmentCallback(alignment) {
    console.log("alignment:", alignment);
}

function useRequestBarcodeAlignmentCallback(barcode) {
    barcode.getAlignment(requestBarcodeAlignmentCallback, onTxError);
}
```

---

## Nearby

- **Previous:** [RequestAutoBaselineCallback Function](https://docs.textcontrol.com/ds-server/reference/javascript/requestautobaselinecallback/llms-full.txt)
- **Next:** [RequestBarcodeFrameCallback Function](https://docs.textcontrol.com/ds-server/reference/javascript/requestbarcodeframecallback/llms-full.txt)