XMLHttpRequestEventTarget

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.

Note: This feature is available in Web Workers, except for Service Workers.

XMLHttpRequestEventTarget is the interface that describes the event handlers shared on XMLHttpRequest and XMLHttpRequestUpload.

You don't use XMLHttpRequestEventTarget directly; instead you interact with the sub classes.

Events

The following events are made available to XMLHttpRequest and XMLHttpRequestUpload:

abort

Fired when a request has been aborted, for example because the program called XMLHttpRequest.abort(). Also available via the onabort event handler property.

error

Fired when the request encountered an error. Also available via the onerror event handler property.

load

Fired when a request transaction completes successfully. Also available via the onload event handler property.

loadend

Fired when a request has completed, whether successfully (after load) or unsuccessfully (after abort or error). Also available via the onloadend event handler property.

loadstart

Fired when a request has started to load data. Also available via the onloadstart event handler property.

progress

Fired periodically when a request receives more data. Also available via the onprogress event handler property.

timeout

Fired when progress is terminated due to preset time expiring. Also available via the ontimeout event handler property.