# RequestHeaderFooterCallback Function

> Callback function for requesting a header or footer.

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

---

### Description

Callback function for requesting a [header or footer](https://docs.textcontrol.com/tx-text-control-dotnet-server/reference/javascript/headerfooter/llms-full.txt).

### Syntax

```javascript
function(<HeaderFooter> headerFooter)
```

### Examples

The following example demonstrates `RequestHeaderFooterCallback` in a practical document-editing workflow. Callback function for requesting a header or footer.

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

function requestHeaderFooterCallback(headerFooter) {
    console.log("header footer:", headerFooter);
}

function useRequestHeaderFooterCallback(page) {
    page.getFooter(requestHeaderFooterCallback, onTxError);
}
```

---

## Nearby

- **Previous:** [RequestFrameStyleCallback Function](https://docs.textcontrol.com/tx-text-control-dotnet-server/reference/javascript/requestframestylecallback/llms-full.txt)
- **Next:** [RequestHeaderFooterTypeCallback Function](https://docs.textcontrol.com/tx-text-control-dotnet-server/reference/javascript/requestheaderfootertypecallback/llms-full.txt)