Comment by lewisl9029

Another really cool JS dialect I recently learned about is njs from the nginx team: https://github.com/nginx/njs

This video goes into some of the design and tradeoffs: https://www.youtube.com/watch?v=Jc_L6UffFOs

TL;DW: they optimized for fast creation/destruction of low-footprint VMs with no JIT or garbage collection.