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A comment on Facebook Launches Flow, Static Type Checker for JavaScript. Parent comment

Re:Facebook Launches Flow, Static Type Checker for JavaScript by lpw25 on Tuesday November 18, 2014 @06:51PM (#8627199)
OCaml has excellent compile-to-JavaScript support. Facebook use this to compile their Hack type-checker for an in-browser IDE. I imagine they do something similar for Flow.
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Re:Facebook Launches Flow, Static Type Checker for JavaScript by avsm on Wednesday November 19, 2014 @02:12AM (#8628676)
They do indeed use js_of_ocaml in the Flow test suite to compile the full Flow parser to JavaScript and then test that.

See the related discussion on packaging it in the OPAM pull request: https://github.com/ocaml/opam-repository/pull/3083

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