# RequestMeasuringUnitCallback Function

> Callback function for requests expecting an MeasuringUnit value.

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

---

### Description

Callback function for requests expecting an [MeasuringUnit](https://docs.textcontrol.com/ds-server/reference/javascript/txtextcontrol/measuringunit-enumeration/llms-full.txt) value.

### Syntax

```javascript
function(<MeasuringUnit> unit)
```

### Examples

The following example demonstrates `RequestMeasuringUnitCallback` in a practical document-editing workflow. Callback function for requests expecting an MeasuringUnit value.

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

function requestMeasuringUnitCallback(unit) {
    console.log("unit:", unit);
}

TXTextControl.getPageUnit(requestMeasuringUnitCallback, onTxError);
```

---

## Nearby

- **Previous:** [RequestListFormatCharacterCallback Function](https://docs.textcontrol.com/ds-server/reference/javascript/requestlistformatcharactercallback/llms-full.txt)
- **Next:** [RequestMisspelledWordCallback Function](https://docs.textcontrol.com/ds-server/reference/javascript/requestmisspelledwordcallback/llms-full.txt)