Yes, yet another promise library, it *is* getting a little old I know.
https://www.npmjs.org/package/promisable
https://github.com/iarna/promisable
How exactly does this stand out from the dozens of other promise
implementations?
* Errors have to be handled or they'll be thrown, saving you from having to
debug the phantom promise problem, eg:
obj.thingThatPromises()
.then(function(v){ … });
If the above is rejected then most (all?) other promise libraries would
just silently ignore it. With promisables it would throw the error, as you
didn't pass an error callback or use catch.
* Very small code size compared to other promise implementations (4kb, one
file) due to taking a mostly functional point of view. OO bits are more
sugar then implementation. The other reason it remains small is that it
sticks just to implementing the promise abstraction. It doesn't implement
combinators. I'm of the opinion that combinators should go in separate
promise-library agnostic libraries. (Why do you care that it's small? The
internals require less context to grasp.)
* Libraries that build on this library can easily offer multiple modes of
operation to allow users to pick the mode they're most comfortable with.
Eg:
library.asyncThing(callback) {
return Promisable.andMaybeCallback(callback,function(R){
doAsyncThing(R);
});
}
// And then a user can:
library.asyncThing(function(e,value) { ... });
library.asyncThing()
.then(function(value){ ... })
.catch(function(e){ ... });
library.asyncThing()
(function(e,value){ ... });
(Because the nodejs Google group apparently hates me, I'm reposting this
from another account. Hopefully the message will go through this time
instead of being eaten and shunted to the ether.)
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