# RequestFormFieldCallback Function

> Callback function for requesting a FormField.

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

---

### Description

Callback function for requesting a FormField.

### Syntax

```javascript
function(<FormField> formField)
```

### Examples

The following example demonstrates `RequestFormFieldCallback` in a practical document-editing workflow. Callback function for requesting a FormField.

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

function requestFormFieldCallback(formField) {
    console.log("form field:", formField);
}

TXTextControl.textParts.getMainText(function(mainText) {
    const formFields = mainText.formFields;
    formFields.getItem(requestFormFieldCallback, onTxError, 25);
}, onTxError);
```

---

## Nearby

- **Previous:** [RequestFormattingStyleCallback Function](https://docs.textcontrol.com/ds-server/reference/javascript/requestformattingstylecallback/llms-full.txt)
- **Next:** [RequestFormulaReferenceStyleCallback Function](https://docs.textcontrol.com/ds-server/reference/javascript/requestformulareferencestylecallback/llms-full.txt)