# RequestBarcodeTypeCallback Function

> Callback function for requesting a barcode type value.

- **Product:** TX Text Control .NET Server
- **Section:** Reference
- **Kind:** Function
- **Path:** TX Text Control .NET Server > Reference > JavaScript API > RequestBarcodeTypeCallback Function
- **277 words**
- **Web URL:** https://docs.textcontrol.com/tx-text-control-dotnet-server/reference/javascript/requestbarcodetypecallback/
- **LLMs URL:** https://docs.textcontrol.com/tx-text-control-dotnet-server/reference/javascript/requestbarcodetypecallback/llms.txt
- **LLMs-Full URL:** https://docs.textcontrol.com/tx-text-control-dotnet-server/reference/javascript/requestbarcodetypecallback/llms-full.txt

---

### Description

Callback function for requesting a [barcode type](https://docs.textcontrol.com/tx-text-control-dotnet-server/reference/javascript/txtextcontrol-barcodetype/llms-full.txt) value.

### Syntax

```javascript
function(<BarcodeType> barcodeType)
```

### Examples

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

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

function requestBarcodeTypeCallback(barcodeType) {
    console.log("barcode type:", barcodeType);
}

function useRequestBarcodeTypeCallback(barcode) {
    barcode.getBarcodeType(requestBarcodeTypeCallback, onTxError);
}
```

---

## Nearby

- **Previous:** [RequestBarcodeTextAlignmentCallback Function](https://docs.textcontrol.com/tx-text-control-dotnet-server/reference/javascript/requestbarcodetextalignmentcallback/llms-full.txt)
- **Next:** [RequestBooleanCallback Function](https://docs.textcontrol.com/tx-text-control-dotnet-server/reference/javascript/requestbooleancallback/llms-full.txt)