Implement Promise.prototype.finally

[ljharb]

Promise.prototype.finally is stage 3 - time to implement it! :-D

Test262 tests are merged.

Spec is here.

• Path to Stage 4! tc39/proposal-promise-finally#18

[ljharb]

This is stage 3, and I'm hoping to seek stage 4 in November or January; any update on this?

[dilijev]

This work is tentatively planned for the near future if we can fit it in. Earliest we can begin work on it is late October / early November.

[ljharb]

@dilijev early November is here!

[dilijev]

@ljharb Unfortunately, this didn't make the cut for our feature work on the upcoming release. We'll re-evaluate priorities and see when we can tackle this work item.

[ljharb]

@dilijev please note that I'm seeking stage 4 for it in 3 weeks; if it doesn't make it then, I'd expect it to do so in January.

[dilijev]

@ljharb at this point, it will not make it into the next Windows/Edge release. Best case the feature could be checked in to ChakraCore master and/or Node-ChakraCore, but we can't commit to anything at the moment. What is the essence of the implemented feature requirement for the process?

[ljharb]

It already has the requisite two (three, now) implementations; i was just hoping it could hit stage 4 with all 4 browsers - as is, it seems like edge will be the last to implement it.

[rhuanjl]

Is anyone working on this? If not I'd like to have a stab at making a PR for it.

[ljharb]

This is now stage 4, so it'd be great to get it implemented ASAP!