---
title: ontimeout
framework: tvmljs
role: symbol
role_heading: Instance Property
path: tvmljs/xmlhttprequest/1627321-ontimeout
---

# ontimeout

A callback function that is called when a request times out.

## Declaration

```data
attribute function ontimeout;
```

## Discussion

Discussion This attribute must be set to a function; for example, XMLHttpRequest.ontimeout = function () {}.

## See Also

### Implementing Callback Functions

- [onabort](tvmljs/xmlhttprequest/1627410-onabort.md)
- [onerror](tvmljs/xmlhttprequest/1627328-onerror.md)
- [onload](tvmljs/xmlhttprequest/1627316-onload.md)
- [onloadend](tvmljs/xmlhttprequest/1627365-onloadend.md)
- [onloadstart](tvmljs/xmlhttprequest/1627440-onloadstart.md)
- [onreadystatechange](tvmljs/xmlhttprequest/1627414-onreadystatechange.md)