cspjs

(shameless plug) The state machine approach is one I used in an old sweetjs library called cspjs[1] which implemented async tasks into JavaScript well before async/await. I still think there are some good ideas left there - especially async error handling and native "data flow variables". [1] https://github.com/srikumarks/cspjs

What I would really like is for JS to have a good macro system so I don't have to subscribe to the two caste hierarchy of language creator and language user. Sweet.js [1] did it for me initially as cspjs[2] had async, await and more years before ... but I never found the time to ramp up to the updated version sadly so I can't comment on its state now. [1] https://www.sweetjs.org/ [2] https://gitHub.com/srikumarks/cspjs

Been using async/await like sweetjs macro "task" in production for around 1.5yrs (https://github.com/srikumarks/cspjs). This code would read - task getUsersWithFriends() { users <- getUsers(); catch (e) { return trySomethingElse(users); } // Everything below is protected by the catch above. withFriends <- filterUsersWithFriends(users); return withFriends; } .. with errors propagating to nodejs style callbacks automatically. No need for overheads like "promisifyAll" either. cspjs turns the task into a state machine. Better semantics for catch and finally where you can retry operation from within catch clause (ex: exponential backoff). disclosure: author of cspjs. couldn't help shameless plug since this was being touted as the "future" in the original post!

Shameless plug - CSPJS - a sweetjs macro that supports a similar async mechanism and (imho) better error handling facilities. https://github.com/srikumarks/cspjs Have been using it in a production system for a year now.

https://github.com/srikumarks/cspjs - The readme has benchmarks from bluebird generators. It is only 74 ms slower than the sweet.js solution. So the author knows.

While reading this article, I remembered this: https://github.com/jlongster/js-csp, which explicitly relies on es6 generators. I wonder if anyone can help us out by comparing and contrasting this to the subject of the article (https://github.com/srikumarks/cspjs).