How can you terminate an async call? All you're doing is refusing to handle the result. Explain how I'm wrong if so.
On Tue, 24 Apr 2018 at 13:27 Andrea Giammarchi <[email protected]> wrote: > The `isStillValid` is limited in possibilities. I think listeners open > new possibilities, specially for very complex operations. > > I see a simple scenario like the following one: > > - user asks for a very expensive task clicking section A > - while it's waiting for it, user changes idea clicking section B > - both section A and section B needs that very expensive async call > - drop "going to section A" info and put "go to section B" to that > very same promise > - whenever resolved, do that action > > A caching mechanism to trigger only once such expensive operation would > also work, yet it's not possible to drop "go into A" and put "go into B" > > My PoC also is per promise, so if you use `.then()` over the passed along > promise, you can add your own listeners in there too, without affecting the > initial one (and vice versa) > > > > > On Mon, Apr 23, 2018 at 11:07 PM, Alex Vincent <[email protected]> > wrote: > >> >> My proposal is that we add a way of removing a particular callback, or >>> all callbacks, from a Promise. This is different to cancelling a Promise >>> and would instead happen if you want the operation to continue but are no >>> longer interested in running a function when the Promise is resolved or >>> rejected. >>> >> >> Devil's advocate from the peanut gallery: what's so hard about adding: >> >> ```javascript >> if (!isStillValid) return; >> ``` >> -- >> "The first step in confirming there is a bug in someone else's work is >> confirming there are no bugs in your own." >> -- Alexander J. Vincent, June 30, 2001 >> >> _______________________________________________ >> es-discuss mailing list >> [email protected] >> https://mail.mozilla.org/listinfo/es-discuss >> >> > _______________________________________________ > es-discuss mailing list > [email protected] > https://mail.mozilla.org/listinfo/es-discuss >
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