As the name suggests, Snap2Js is a compiler from Snap! to JavaScript.
Snap2Js requires NodeJS LTS. Snap2JS can be installed using npm as follows:
npm install -g snap2js
Next, you can compile your favorite Snap! application by first exporting it to xml then using snap2js to compile it to a js file! A "hello world" example project is provided here.
snap2js hello-world.xml
node hello-world.js