This post delves into some of the pitfalls encountered when working with JavaScript promises, suggests some improvements and looks at a brief glimpse of the future of asynchronous programming in JavaScript.

This was first presented at one of our internal tech team talks and encouraged our CTO to rethink the coding of our latest JavaScript project here at Talis.

Earlier this year, version 4 of Express was released. It’s got a bunch of pretty big changes, so if you’re thinking of upgrading, you’re going to need to be aware of them. Hopefully at the end of this post you shouldn’t be too daunted when thinking of updating your version.