They mention Opal and include a link; it goes to a website for a casino.
Volt is a reactive web framework where your Ruby code runs both on the server and the client (via opal).
Volt is a reactive web framework where your Ruby code runs both on the server and the client (via opal).
Opal Ruby to JavaScript Compiler It is source-to-source, making it fast as a runtime. Opal includes a casino comparison compiler (which can be run in any browser), a corelib and runtime implementation. The corelib/runtime is also very small.