True, but its main target is definitely the browser. The stand-alone interpreter of Node.js can run code written in Scala.js, and is actually used for benchmarks (along with d8) [1]. However, Scala.js does not emit Node.js modules, nor does it provide any built-in way to import other Node.js modules.
A friendly word of PR advice: I'm not a customer and not affected by your outage, but if I were, being told to keep calm would really irritate me, especially if I were fighting fires right now. If you want someone to calm down, telling them to calm down generally won't have the desired effect.