Fable 5.6.0 released!

NewsBot · 5 July 2026 15:18

Fable 5.6.0 has been released.

Features

(all) Allow [<Emit>] on StringEnum cases (#4711) (0b1f61ee)

(js/ts) Optimize printfn with constant string to console.log (#4718) (2d6d083a)

(js/ts) Add Path.Combine support (b1b1e273)

(js/ts) Add System.IO.Path and System.IO.File API support (ec99fac5)

(js/ts/python) Warn on duplicate attached member names (#4715) (fd06aa64)

(js/ts/python) Add Environment and Console.Error support (6e082f95)

(py) Add Path.Combine support (4c901c65)

(python) Add Directory.Exists, Directory.CreateDirectory (f4b4eabc)

(ts) [] interfaces extend parent [] type (#4717) (4f4243cd)

Bug Fixes

Generate an error on erased union case typed as obj (#4710) (bf2134d5)

(all) Include return type in overload suffix for op_Implicit/op_Explicit (#4712) (a6846010)

(js/ts) DateTime.ToString() and %A are now consistent across all DateTimeKind values (#4714) ([de98b0e4](fix(js/ts): DateTime.ToString() and %A are now consistent across all … · fable-compiler/Fable@de98b0e · GitHub…

Link: Release 5.6.0 · fable-compiler/Fable · GitHub