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MIGRATION.md

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Potentially breaking changes

  • Float.Show now uses string_of_float for cross-compatibility. This might be undesirable depending on your use cases, in which case JsFloat.Show is provided which uses Js.Float.toString. See bucklescript#3412.

  • The JsArray module is provided for users that want to have the transpiled bucklescript code use the builtin Array.prototype api instead of the version used for Ocaml compatibility. Using this on the frontend would mean potentially smaller bundle sizes (implementations are built into JS), and possible performance improvements since the javascript engines know explicitly what the code is trying to do.

  • Result.Unsafe functions now raise an Ocaml Invalid_argument error instead of a JS type error on failure. No js compat is currently provided since these are unsafe functions to begin with and shouldn't be used.

Notes

These are updates that shouldn't cause any breaking changes but are documentated here

  • Int.EuclideanRing also uses the builtin min function now. This functions behaves identically to the js counterpart Js.Math.min, it's just noted here for reference.

  • Option.getWithDefault copies the same implementation from bucklescript's stdlib so that it works on native as well.