- I’ve used everything. NodeJS, React, Rails, Python , Rust. Once I learned Haskell I fell in love and never went back. I code in Haskell because I enjoy it, I can sleep at night because of the safety guarantees (no crashes), and I find it aesthetically pleasing and easy to think in. One of the things I enjoy most is the stability of the package APIs.

- I try to avoid JS. I do progressive enhancement with vanilla JS, and avoid JS webapps unless absolutely necessary. If I need to write a JS webapp, I use a purely functional approach. I found that when writing React, using frameworks, using TypeScript or PureScript, I lost so much time and effort managing my build step and fighting with APIs and package churn. I use preact with the htm library, vanilla JS, and most importantly no build step and no npm. I don’t use a framework. I use a purely functional approach inspired from Haskell/Elm. I have an update function which returns a new state and effects from the current state and event, and a dispatch function which is attached to onevent props. The dispatch function calls the update function, renders, and runs effects. These few functions are 20 lines of code.

- No challenges specific to Haskell so far. Of course I had to learn the ecosystem when I started, which packages to use, language and tooling gotchas, etc. but that is the case for any language.