# RequestSignatureFieldCallback Function

> Callback function for requests receiving a SignatureField object.

- **Product:** DS Server
- **Section:** Reference
- **Kind:** Function
- **Introduced:** 31.0
- **Path:** DS Server > Reference > JavaScript API > RequestSignatureFieldCallback Function
- **261 words**
- **Web URL:** https://docs.textcontrol.com/ds-server/reference/javascript/requestsignaturefieldcallback/
- **LLMs URL:** https://docs.textcontrol.com/ds-server/reference/javascript/requestsignaturefieldcallback/llms.txt
- **LLMs-Full URL:** https://docs.textcontrol.com/ds-server/reference/javascript/requestsignaturefieldcallback/llms-full.txt

---

### Description

Callback function for requests receiving a [SignatureField](https://docs.textcontrol.com/ds-server/reference/javascript/signaturefield/llms-full.txt) object.

### Syntax

```javascript
function(<SignatureField> signatureField)
```

### Examples

The following example demonstrates `RequestSignatureFieldCallback` in a practical document-editing workflow. Callback function for requests receiving a SignatureField object.

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

function requestSignatureFieldCallback(signatureField) {
    console.log("signature field:", signatureField);
}

TXTextControl.signatureFields.getItem(requestSignatureFieldCallback, onTxError, 25);
```

---

## Nearby

- **Previous:** [RequestSelectionFormFieldCallback Function](https://docs.textcontrol.com/ds-server/reference/javascript/requestselectionformfieldcallback/llms-full.txt)
- **Next:** [RequestSignatureImageCallback Function](https://docs.textcontrol.com/ds-server/reference/javascript/requestsignatureimagecallback/llms-full.txt)