Reason (programming language)

Reason, also known as ReasonML, is a syntax extension and toolchain for OCaml created by Jordan Walke, who also created the React framework, at Facebook.[3] Reason offers a syntax familiar to JavaScript programmers, and compiles to native code using OCaml's compiler toolchain. Reason code may also be compiled to JavaScript using the ReScript compiler.[4]

Reason
ParadigmsMulti-paradigm: functional, imperative, modular, object-oriented
FamilyML: Caml: OCaml
Designed byJordan Walke
First appearedMay 16, 2016 (2016-05-16)[1]
Stable release
3.11.0[2] Edit this on Wikidata / February 25, 2024 (February 25, 2024)
LicenseMIT
Filename extensions.re, .rei
Websitereasonml.github.io
Influenced by
OCaml, JavaScript

The Reason community officially provides ReasonReact as a solution for React-based web applications.[5]

BuckleScript and ReScript

Reason was originally compiled to JavaScript using the BuckleScript compiler,[6] which was created at Bloomberg L.P.

In 2020, BuckleScript was rebranded to ReScript, essentially creating a separate language that had different syntax from Reason and only compiled to JavaScript.[7]

The ReScript compiler continues to support Reason syntax, and the two languages share that part of the toolchain.

See also
  • Elm – A functional language that uses an abstraction called ports to communicate with JavaScript
  • PureScript – A strongly-typed, purely-functional programming language that compiles to JavaScript

References
  1. "Simple, fast & type safe code that leverages the JavaScript & OCaml ecosystems: facebook/reason". GitHub. Facebook. 2019-03-23. Retrieved 2019-03-23.
  2. "Release 3.11.0". 25 February 2024. Retrieved 25 March 2024.
  3. "What is ReasonML?". 2ality. Retrieved 2019-03-23.
  4. "Overview: ReScript Documentation". rescript-lang.org. Retrieved 2020-08-10.
  5. "ReasonReact". GitHub.
  6. "BuckleScript". bloomberg. Retrieved 2022-09-11.
  7. "BuckleScript & Reason Rebranding". rescript-lang. Retrieved 2022-09-11.
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