12.0.0-alpha.1

🚀 New Feature

• Allow @directive on functions for emitting function level directive code (let serverAction = @directive("'use server'") (~name) => {...}). #6756
• Add rewatch to the npm package as an alternative build tool. #6762
• Throws an instance of JavaScript's new Error() and adds the extension payload for cause option. #6611
• Allow free vars in types for type coercion e :> t. #6828
• Allow private in with constraints. #6843
• Add regex literals as syntax sugar for @bs.re. #6776
• Improved mechanism to determine arity of externals, which is consistent however the type is written. #6874 #6881 #6883

💥 Breaking Change

• Make j and js allowed names for tag functions. #6817
• lazy syntax is no longer supported. If you're using it, use Lazy module or React.lazy_ instead. #6342
• Remove handling of attributes with bs. prefix (@bs.as -> @as etc.). #6643
• Remove obsolete @bs.open feature. #6629
• Drop Node.js version <18 support, due to it reaching End-of-Life. #6429
• Remove deprecated -bs-super-errors option. #6814
• Some global names and old keywords are no longer prefixed. #6831
• Remove ml parsing tests and conversion from .ml to .res via format. #6848
• Remove support for compiling .ml files, and general cleanup. #6852
• Remove rescript convert subcommand. #6860
• Remove support for @bs.send.pipe. This also removes all functions in Js_typed_array that rely on @bs.send.pipe. #6858 #6891
• Remove deprecated Js.Vector and Js.List. #6900

🐛 Bug Fix

• Fix unhandled cases for exotic idents (allow to use exotic PascalCased identifiers for types). #6777 #6779 #6897
• Fix unused attribute check for @as. #6795
• Reactivate unused attribute check for @int. #6802
• Fix issue where using partial application ... can generate code that uses Curry at runtime. #6872
• Avoid generation of Curry with reverse application |>. #6876
• Fix issue where the internal ppx for pipe -> would not use uncurried application in uncurried mode. #6878

🏠 Internal

• Build with OCaml 5.2.0. #6797
• Convert OCaml codebase to snake case style. #6702
• Fix -nostdlib internal compiler option. #6824
• Remove a number of ast nodes never populated by the .res parser, and resulting dead code. #6830
• Remove coercion with 2 types from internal representation. Coercion e : t1 :> t2 was only supported in .ml syntax and never by the .res parser. #6829
• Convert caml_format and js_math to .res. #6834
• Convert js.ml files to .res. #6835
• Remove old .ml tests. #6847
• Make compiler libs ready for uncurried mode. #6861
• Make tests ready for uncurried mode. #6862
• Make gentype tests uncurried. #6866
• Remove @@uncurried.swap, which was used for internal tests. #6875
• Build the compiler libraries/tests in uncurried mode. #6864
• Ignore -uncurried command-line flag. #6885
• Cleanup: remove tracking of uncurried state in parser/printer. #6888
• Remove %opaque primitive. #6892
• Reunify JsxC/JsxU -> Jsx etc. #6895
• Remove the transformation of foo(1,2) into Js.Internal.opaqueFullApply(Internal.opaque(f), 1, 2), and change the back-end to treat all applications as uncurried. #6893

💅 Polish

• Make the --help arg be prioritized in the CLI, so correctly prints help message and skip other commands. #6667
• Remove redundant space for empty return in generated js code. #6745
• Remove redundant space for export in generated js code. #6560
• Remove redundant space after continue in generated js code. #6743
• Remove empty export blocks in generated js code. #6744
• Fix indent for returned/thrown/wrapped in parentheses objects in generated js code. #6746
• Fix indent in generated js code. #6747
• In generated code, use let instead of var. #6102
• Turn off transformation for closures inside loops when capturing loop variables, now that let is emitted instead of var. #6480
• Improve unused attribute warning message. #6787
• Remove internal option use-stdlib from build schema. #6778
• Fix Js.Types.JSBigInt payload to use native bigint type. #6911
• Deprecate %external extension, which has never been officially introduced. #6906

11.1.3

🐛 Bug Fix

• Fix tag function location on compiler error. #6816
• Fix Deno compatibility issues on Windows. #6850
• Fix issue with infinite loops with type errors on recursive types. #6867
• Ignore @uncurry attribute in uncurried mode, to avoid generating calls to Curry at runtime. #6869
• Avoid generating calls to Curry when adjusting arity of uncurried functions. #6870
• Fix build after calling without -warn-error, see #6868 for more details. #6877
• Fix issue with uninitialized _param in recursive functions with unit argument. #6907

11.1.3-rc.1

🐛 Bug Fix

• Omit standard library dir from load path if -nostdlib is set. #6833

11.1.2

🐛 Bug Fix

• Fix issue where capitalised type variables were only allowed in certain positions. #6820

11.1.2-rc.1

🚀 New Feature

• Support Windows 11 ARM (using the x64 binaries in emulation). #6813

🐛 Bug Fix

• Fix location of let bindings with attributes. #6791
• PPX v4: mark props type in externals as @live to avoid dead code warnings for prop fields in the editor tooling. #6796
• Fix issue where optional labels were not taken into account when disambiguating record value construction. #6798
• Fix issue in gentype when type Jsx.element surfaces to the user. #6808
• Fix inclusion check (impl vs interface) for untagged variants, and fix the outcome printer to show tags. #6669
• Fix encoding inside tagged template literals. #6810

11.1.1

🐛 Bug Fix

• Fix issue of incorrect switch cases with identical bodies when mixing object and array. #6792
• Fix formatter eats comments on the first argument of a uncurried function. #6763
• Fix formatter removes parens in pipe operator with anonymous uncurried function. #6766

11.1.0

ReScript 11.1, which builds upon the foundation laid by ReScript 11.0 earlier this year, comes with a host of exciting additions.

🚀 Highlights

• JSX for More Than React
• Tagged Template Literals
• Import Attributes
• BigInt Support
• Array Spread Syntax
• Hyphens in JSX Tag Names
• Omit Trailing Undefined in External Function Calls
• %todo and warn-error

📋 More Information

• ReScript 11.1 Release Blog Post
• Changelog

11.1.0-rc.8

🚀 New Feature

• Add %todo extension for leaving implementation for later. #6713
• Add -warn-error argument for generating errors in CI. Useful for %todo extension. #6717

🐛 Bug Fix

• Improve error when using @deriving(accessors) on a variant with record arguments. #6712
• Stop escaping JSX prop names with hyphens. #6705
• Fix trailing undefined for optional parameters not omitted with @send and @new. #6716
• Fix JSX4 adding the incorrect type annotation for the prop ref in React.forwardRef component. #6718
• Fix description for warning number 110. #6725

💅 Polish

• Module spec es6 and es6-global is deprecated in favor of esmodule. #6709

11.1.0-rc.7

🐛 Bug Fix

• Fix variance setting for builtin dict type. Fixes issues around inference. #6707

11.1.0-rc.6

🚀 New Feature

• Add experimental BigInt support. #6670, #6696

🐛 Bug Fix

• Fix mishandling of uncurried functions in super errors. #6694