Didn't know about that one, that's indeed big flaw, jQuery's solution is
far from complete.
On Wednesday, October 3, 2012 4:18:42 AM UTC+2, Domenic Denicola wrote:
>
> jQuery promises also aren't interoperable with other promise-consuming
> libraries, because they do not transform errors thrown in callbacks into
> rejection reasons, violating Promises/A. So e.g.
>
> function doOperationAndDontGiveUp(operation) {
> return operation().then(null, function (error) {
> if (error instanceof TemporaryNetworkError) {
> return doOperationAndDontGiveUp(operation);
> }
> throw error;
> });
> }
>
> doOperationAndDontGiveUp(whatever).then(console.log, function (error) {
> console.log("A non-temporary error: ", error);
> });
>
> will not work, because you can't re-throw errors in jQuery to stay in a
> rejected state; the error will end up uncaught by any handlers except
> window.onerror/process.on("uncaughtException"), and so the rejection
> handler will never be called.
>
> There's also the issue where jQuery promises can be resolved with multiple
> values, which other libraries cannot consume.
>
> You're better off using a different promise library, like Kris Kowal and
> myself's Q, or Mariusz's deferred, or When, in both the browser and the
> server, and immediately converting any jQuery promises to real Promises/A
> promises using e.g. Q.when(jQueryPromise).
>
>
> On Tuesday, October 2, 2012 12:01:03 PM UTC-4, Jeff Barczewski wrote:
>>
>> Mariusz,
>>
>> I was using an old version of your deferred module, [email protected] which
>> was API compatible with jQuery.
>>
>> I guess for upgrading many things have changed since then:
>>
>> - .promise() becomes .promise
>> - Deferred.when() - I will have to create my own, right?
>>
>> Anything else that you remember which will need to change? (I know this
>> was a long time ago when you changed it so not a big deal if you don't
>> remember)
>>
>>
>> If I want to keep the jQuery.Deferred style API (for consistency on all
>> client and server code) but use your latest module, then I guess I need to
>> create some light adapters which will use your api under the covers.
>>
>> If you have any other ideas or thoughts on this let me know.
>>
>> Thanks in advance!
>>
>> Jeff
>>
>>
>>
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