onabort

onabort is a DOM event handler attribute that specifies a script to run when the abort event fires on a target element. The abort event is triggered when the loading of a resource is canceled. This can occur for various reasons, such as the user navigating away from the page, a script calling abort() on a resource, or a load operation being programmatically canceled. Resources that commonly emit an abort event include images, scripts, audio or video elements, and other media or loaded resources.

Usage and handling ideas:

- In HTML, you can assign an inline handler, for example: <img src="large-image.jpg" onabort="handleAbort()">.

- In JavaScript, you can assign a function to the onabort property, or attach a listener with addEventListener: element.onabort = handleAbort; element.addEventListener('abort', handleAbort).

- The event object passed to the handler provides context about the aborted resource; the target of the event is typically the element whose loading was canceled.

Notes:

- onabort is primarily associated with resource loading managed by the browser, such as images or media. It is distinct from aborting other asynchronous operations like fetch requests, which are commonly controlled with AbortController.

- For fetch-based cancellation, developers typically use AbortController and listen for the abort signal rather than relying on onabort.

- Cross-browser support for onabort exists in modern browsers, and the pattern remains a standard way to respond to loading cancellations in inline HTML or DOM script.

See also: onload, onerror, addEventListener('abort'), AbortController (for fetch and other programmatic cancellations).