suspend

Another upcoming method to avoid callback hell that is my personal favorite is harmony generators and yield. Reminds me so much of C# async. Two great libraries can handle it today on beta versions of node [1,2]. I have only used suspend. See this gist for comparison https://gist.github.com/codystebbins/a2c354d25ce28879bfe1. With generators try/catch can be used, avoiding a lot of the redundant error handling. Crabdude's library can avoid the overhead of try/catch [3]. And if developers want static typing, they should check out TypeScript. Works great with node. [1] https://github.com/jmar777/suspend [2] https://github.com/visionmedia/co [3] https://github.com/CrabDude/trycatch

Callback hell isn't, but promises do help (to a point) In 0.12, node will ship with a version of v8 which has generators (hidden under the --harmony flag), which are shallow coroutines, which allow for the same code style as go-routines. Existing non-blocking libraries will be reusable with generators via e.g. https://github.com/jmar777/suspend or https://github.com/visionmedia/co etc. Performance could also potentially improve as in V8 closures are much more expensive than generators.

ES6 generators will be the solution for callback hell in node.js. Node 0.11 already has generators support hidden behind a flag (--harmony-generators) and eventually it will be enabled by default. Generators + libraries like this https://github.com/jmar777/suspend will make node.js code more readable.