This feature is non-standard and is not on a standards track. Do not use it on production sites facing the Web: it will not work for every user. There may also be large incompatibilities between implementations and the behavior may change in the future.

This property specifies a callback function to be run when a DOMRequest fails.

Note: This feature is available in Web Workers.


request.onerror = function;

Where request is a DOMRequest object and function is a JavaScript function to run when the request fails to complete successfully.


Not part of any current specification.

Browser compatibility

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
Basic support ? 13.0 (13.0) ? ? ?
Available in workers ? 41.0 (41.0) ? ? ?
Feature Android Chrome for Android Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
Basic support ? ? 13.0 (13.0) ? ? ?
Available in workers ? ? 41.0 (41.0) ? ? ?

See also

Document Tags and Contributors

Contributors to this page: fscholz, chrisdavidmills, teoli, jsx, kscarfone, Sheppy, tregagnon
Last updated by: fscholz,