Not many problems as you would imagine, but but pretty much because this PHP framework happened to be pretty well built around really good practices and standards.
The main motivation behind this migration was because the company wanted to start using API Gateway and Amazon Lambda, and it was relatively easy to make this move.
vincent desmares
I wrote an article about this topic: medium.com/p/migrating-from-php-to-javascript-wit…. I hope it can be useful to someone :) Feedback welcome!