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Opal Ruby to Javascript Compiler It is source-to-source, making it fast as a runtime. Opal includes a compiler (which can be run in any browser), a corelib and runtime implementation. The corelib/runtime is also very small. Opal Documentation opal.min.js opal-parser.min.js Use the CDN Opal is hosted on GitHub . You can join the community by chatting on Gitter at opal/opal or on Freenode IRC (chann