I also work at Facebook. These comments do not reflect any internal wisdom at Facebook. The article should probably be retitled "...from a junior front end engineer."
Facebook uses Haskell internally for a handful of projects[0] and its C++ library, Folly[1], uses a lot of functional programming idioms (which are actually used extensively internally).
Facebook uses Haskell internally for a handful of projects[0] and its C++ library, Folly[1], uses a lot of functional programming idioms (which are actually used extensively internally).
[0]: https://code.facebook.com/posts/745068642270222/fighting-spa... [1]: https://github.com/facebook/folly/tree/master/folly