bluebird

But there are also some gems such as Bluebird for promises, which makes the callback hell more easier to handle.

It would have worked with bluebird or When just as well - library is really not the big deal here.

I mean, even if I limit myself to lodash/underscore, bluebird, and jQuery, I've got a lot of overlapping bits in there...

Bluebird is the much faster option and has a lot more features, if you're using babel (and a recent node/io.js) you can transpile async/await to bluebird coroutines for maximum performance and syntactic beauty.

BTW would you use bluebird or es6 promises if starting a new project today?

Libraries like bluebird provide typed and predicate catch blocks that let you do exception handling the way you want like in other languages.

In fact many libraries provide promise interface or can be promisified with bluebird.

Is there any chance Bluebird will become the standard in the future?

Userland implementations like Bluebird promises are significantly faster than native promises.

Moreover, it would have been possible to implement in a much simpler wrapper function way (like the link to the API.md file in bluebird above).

) Since Bluebird promises are thennables, the reverse will be true if they're consumed by a different promise library.

I was bitten by bluebird quietly eating exceptions on at least one codebase.

Given Bluebird's speed, superior debuggability, and features, there's really no reason not to use it a this point.

Bluebird) and at least under Node there is little to no reason to use the built-in Promise object at this point in time.

On the other hand, there's really no reason not to use Bluebird.