---
title: onerror
framework: tvmljs
role: symbol
role_heading: Instance Property
path: tvmljs/xmlhttprequest/1627328-onerror
---

# onerror

A callback function that is called if the request fails due to an error.

## Declaration

```data
attribute function onerror;
```

## Discussion

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

## See Also

### Implementing Callback Functions

- [onabort](tvmljs/xmlhttprequest/1627410-onabort.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)
- [ontimeout](tvmljs/xmlhttprequest/1627321-ontimeout.md)