DOM AbortController

[dinoboff]

WHATWG specifies an API similar to the stage 0 proposal and it's getting shipped and used for fetch:

• https://dom.spec.whatwg.org/#abortcontroller
• https://developer.mozilla.org/en-US/docs/Web/API/AbortController

Is this proposal still needed now browsers are shipping something so similar?

[ikokostya]

This issue already discuss in https://github.com/tc39/proposal-cancellation/issues/16

Problems with AbortController from my point of view :

• Depends from event system, but ECMAScript doesn't have any definition for event emitter.
• Depends from browser specific entities like EventTarget.
• Doesn't support synchronous observation to request for cancellation.
• Doesn't support cancellation graph. For real use case you can see https://github.com/tc39/proposal-cancellation/issues/10

Also I don't understand why AbortController uses events, because callback system in CancellationToken looks much simpler.

In my project I use all features (e.g. cancellation graphs) from prex library (which is implementation of this proposal) and I don't understand how I can use AbortController without adding missing functionality.

Don't forget that cancellation proposal is adaption from cancellation in the .NET Framework which is mature.

[dinoboff]

Don't know how I missed it. Thanks.