10.1.0-rc.1

💥 Breaking Change

• Deprecate DOM element attributes in JsxDOM.domProps: begin_, end_, to_
  • Use begin, end, to instead.
• Emit an error when a @string or @int attribute is used in a V4 component #5724

🚀 New Feature

• Add extra variants for output filename suffixes in bsconfig.json: .bs.mjs and .bs.cjs are allowed #5631
• Safe promises: t-first Js.Promise2 bindings, and remove warning for nested promises #5709

🐛 Bug Fix

• Fix issue where uncurried async functions were emitted without async #5718
• Fix location issue in error messages with JSX V4 where the multiple props types are defined rescript-lang/syntax#655
• Fix location issue in make function in JSX V4 that breaks dead code elimination rescript-lang/syntax#660
• Fix parsing (hence pretty printing) of expressions with underscore _ and comments.
• Fix printing of comments inside JSX tag rescript-lang/syntax#664
• Fix issue where formatter erases tail comments inside JSX tag rescript-lang/syntax#663
• Fix issue where the JSX prop has type annotation of the first class module rescript-lang/syntax#666
• Fix issue where an empty record literal {} expected to have a non-record type would type check #5729

👓 Spec Compliance

• Functions with consecutive dots now print as multiple arrow functions like in JavaScript.

💅 Polish

• Add loading, aria-* DOM element attributes in JsxDOM.domProps: ariaCurrent, ariaInvalid, ariaAutocomplete, etc.
• Change the internal representation of props for the lowercase components to record. rescript-lang/syntax#665

10.1.0-alpha.2

🚀 New Feature

• Fix pretty printer where it would print doc comments on the same line as other attributes rescript-lang/syntax#642
• Propagte "jsx" configuration to dependencies #5661
• Add support for empty record literal {} for records where all fields are optional #5658
• Add support for empty record type (e.g. type empty = {}) #5658

🐛 Bug Fix

• Fix issue in formatting JSX spread props rescript-lang/syntax#644
• Fix location issue in error messages with JSX V4 where the body of the component is an application rescript-lang/syntax#633
• Fix printing of type declarations in error message where they would be considered recursive by default
• Fix issue where the printer would omit attributes for -> and |> rescript-lang/syntax#629
• Fix printing of optional fields in records #5654

💅 Polish

• Improvements and fixes for JSX V4. See guide https://github.com/rescript-lang/syntax/blob/master/cli/JSXV4.md
• Mention all missing fields in error message for records, not just one #5657

10.1.0-alpha.1

💥 Breaking Change

• Vendor genType, which does not need to be installed separately anymore. Only TypeScript back-end supported.
• Pipe -> does not support a code block on the right-hand side e.g. x->{ open A; get("test") }

🚀 New Feature

• Experimental support for for async/await #5537

• Make promise a built-in type #5650

• Initial support for JSX V4 including genType, still work in progress.

  • 💥 when V4 is activated, at most one component is allowed for each module.

• Add placeholder types for ES6 collections: Set, Map, WeakSet, and WeakMap #5630

🐛 Bug Fix

• Fix issue with arrays and creation of recursive values #5640
• Fix issue where characters such as newlines would be escaped in a template string expression #5638
• Fix issue where pipe -> processing eats up attributes #5581
• Fix issue where cancelling rescript build would leave the .bsb.lock file behind and block future builds

💅 Polish

• Print patterns in warnings using rescript printer #5492

10.0.1

🐛 Bug Fix

• Fix issue where watch mode would give an error on Windows #5621

10.0.0

Compiler

💥 Breaking Change

• bsconfig.json does not support // line comments anymore.
  • Example: "suffix": ".bs.js" // determine the suffix
  • Fix: remove the comment and use standard json.
• Changed return type of Js.String.match_ as it was wrong. #5070
  • Example: any use of Js.String.match_ and Js.String2.match_
  • Fix: follow the type errors

🚀 New Feature

• New records with optional fields e.g. type opt = {x: int, y?: string} were added as an experimental feature #5423 #5452 New Syntax
• Add support for @new @variadic (see #5364)

🐛 Bug Fix

• Classify bigint correctly #5351
• Fixed crash in rescript build on Windows #5516
• Fixed rescript init command not working #5526
• Fix issue with compiler log not terminated that causes problems with editor extension not clearing issues when fixed #5545

💅 Polish

• Changed Linux build to depend on GLIBC 2.28 again for compatibility with Debian 10.
• Proper M1 support (CI now supports M1 native builds)

Syntax

💥 Breaking Change

• @bs.send.pipe is now removed. Earlier it was deprecated.
• Missing labels in function application is now an error (https://forum.rescript-lang.org/t/ann-more-strict-checks-in-missed-labels/2117).
  • Example: let f = (x, ~z) => x + z; f(1, 2)
  • Fix: do let f = (x, ~z) => x + z; f(1, ~z=2) instead
• Externals without @val annotations do not work anymore, and externals with = "" give an error.
  • Example: external setTimeout: (unit => unit, int) => float = "setTimeout" is not supported anymore.
  • Fix: use @val external setTimeout: (unit => unit, int) => float = "setTimeout" instead.
  • Example2: @val external setTimeout: (unit => unit, int) => float = "" is not supported anymore.
  • Fix2: use @val external setTimeout: (unit => unit, int) => float = "setTimeout" instead.
• Strings processed at compile-time don't need escaping anymore.
  • Example: let blockCommentsRe = %re("/\\/\\*([^*]|[\\r\\n]|(\\*+([^*/]|[\\r\\n])))*\\*+\\//g").
  • Fix: use let blockCommentsRe = %re("/\/\*([^*]|[\r\n]|(\*+([^*/]|[\r\n])))*\*+\//g") instead.
• Remove parsing of "import" and "export" which was never officially supported rescript-lang/syntax#597 rescript-lang/syntax#599
  • Example: export type t = int
  • Fix: @genType type t = int
  • Example2: import realValue: complexNumber => float from "./MyMath"
  • Fix2: @genType.import("./MyMath") external realValue: complexNumber => float = "realValue"

🚀 New Feature

• Unicode is now supported in regular strings and chars (when the symbol fits). This is now going to work: let str = "Σ". And, you'll be able to pattern match on unicode chars: switch c { | 'Σ' => "what a fine unicode char" | _ => "unicode is fun" }
• Doc comments /** ... */ are now supported. Inernally, they are attributes, so are only valid at positions where @foo is allowed, or a syntax error is given. Similarly for module-level /*** comments */ that can go where @@attributes go.

🐛 Bug Fix

• Fix printing for inline nullary functor types #477
• Fix stripping of quotes for empty poly variants #474
• Implement syntax for arity zero vs arity one in uncurried application in #139
• Fix parsing of first class module exprs as part of binary/ternary expr in #256
• Fix formatter hanging on deeply nested function calls #261

Libraries

💥 Breaking Change

• "Attributes not allowed here". If you see this error chances are you're using a ppx that needs updating to a new version.
  See an exampe of how to update a ppx
  • Example: for rescript-relay 0.23.0 is not supported.
  • Fix: use rescript-relay@beta or the new version when released.
• Removed printing modules (Printf, Format etc) and related functions. Details of files added/removed: 0fd8bb0.

🐛 Bug Fix

• Fix library issue with missing bytes_to_string #5573 #5589

💅 Polish

• Several Belt / Js libraries are now converted to ReScript syntax, with corresponding comments in Markdown format suitable for hovering. See #5361.

Playground

🏠 Internal

• Added jsoo_playground_main.ml as the rescript-lang.org playground bundle entrypoint

💥 Breaking Change

• Removed Reason syntax support for the playground experience. See #5375

10.0.0-rc.1

Release Candidate 1

10.0.0-rc.1

🐛 Bug Fix

• Fix library issue with missing bytes_to_string #5573

10.0.0-beta.3

Compiler

💥 Breaking Change

• bsconfig.json does not support // line comments anymore.
  • Example: "suffix": ".bs.js" // determine the suffix
  • Fix: remove the comment and use standard json.
• Changed return type of Js.String.match_ as it was wrong. #5070
  • Example: any use of Js.String.match_ and Js.String2.match_
  • Fix: follow the type errors

🚀 New Feature

• New records with @optional fields e.g. type opt = {x: int, ?y: string} were added as an experimental feature #5423 #5452 New Syntax
• Add support for @new @variadic (see #5364)

🐛 Bug Fix

• Classify bigint correctly #5351
• Fixed crash in rescript build on Windows #5516
• Fixed rescript init command not working #5526
• Fix issue with compiler log not terminated that causes problems with editor extension not clearing issues when fixed #5545

💅 Polish

• Changed Linux build to depend on GLIBC 2.28 again for compatibility with Debian 10.

• Proper M1 support (CI now supports M1 native builds)

Syntax

💥 Breaking Change

• @bs.send.pipe is now removed. Earlier it was deprecated.
• Missing labels in function application is now an error (https://forum.rescript-lang.org/t/ann-more-strict-checks-in-missed-labels/2117).
  • Example: let f = (x, ~z) => x + z; f(1, 2)
  • Fix: do let f = (x, ~z) => x + z; f(1, ~z=2) instead
• Externals without @val annotations do not work anymore, and externals with = "" give an error.
  • Example: external setTimeout: (unit => unit, int) => float = "setTimeout" is not supported anymore.
  • Fix: use @val external setTimeout: (unit => unit, int) => float = "setTimeout" instead.
  • Example2: @val external setTimeout: (unit => unit, int) => float = "" is not supported anymore.
  • Fix2: use @val external setTimeout: (unit => unit, int) => float = "setTimeout" instead.
• Strings processed at compile-time don't need escaping anymore.
  • Example: let blockCommentsRe = %re("/\\/\\*([^*]|[\\r\\n]|(\\*+([^*/]|[\\r\\n])))*\\*+\\//g").
  • Fix: use let blockCommentsRe = %re("/\/\*([^*]|[\r\n]|(\*+([^*/]|[\r\n])))*\*+\//g") instead.
• Remove parsing of "import" and "export" which was never officially supported rescript-lang/syntax#597 rescript-lang/syntax#599
  • Example: export type t = int
  • Fix: @genType type t = int
  • Example2: import realValue: complexNumber => float from "./MyMath"
  • Fix2: @genType.import("./MyMath") external realValue: complexNumber => float = "realValue"

🚀 New Feature

• Doc comments /** ... */ are now supported. Inernally, they are attributes, so are only valid at positions where @foo is allowed, or a syntax error is given. Similarly for module-level /*** comments */ that can go where @@attributes go.

🐛 Bug Fix

• Fix printing for inline nullary functor types #477
• Fix stripping of quotes for empty poly variants #474
• Implement syntax for arity zero vs arity one in uncurried application in #139
• Fix parsing of first class module exprs as part of binary/ternary expr in #256
• Fix formatter hanging on deeply nested function calls #261

Libraries

💥 Breaking Change

• "Attributes not allowed here". If you see this error chances are you're using a ppx that needs updating to a new version.
  See an exampe of how to update a ppx
  • Example: for rescript-relay 0.23.0 is not supported.
  • Fix: use rescript-relay@beta or the new version when released.
• Removed printing modules (Printf, Format etc) and related functions. Details of files added/removed: 0fd8bb0.

💅 Polish

• Several Belt / Js libraries are now converted to ReScript syntax, with corresponding comments in Markdown format suitable for hovering. See #5361.

Playground

🏠 Internal

• Added jsoo_playground_main.ml as the rescript-lang.org playground bundle entrypoint

💥 Breaking Change

• Removed Reason syntax support for the playground experience. See #5375

10.0.0-beta.3

Beta 3

🐛 Bug Fix

• Fix issue with compiler log not terminated that causes problems with editor extension not clearing issues when fixed #5545

Beta 2

💅 Polish

• Changed Linux build to depend on GLIBC 2.28 again for compatibility with Debian 10.

Beta 1

🐛 Bug Fix

• Fixed crash in rescript build on Windows #5516
• Fixed rescript init command not working #5526

💥 Breaking Change

• bsconfig.json does not support // line comments anymore
• Externals without @val annotations do not work anymore, and externals with = "" give an error.
• Regular expressions don't need escaping. E.g. let blockCommentsRe = %re("/\\/\\*([^*]|[\\r\\n]|(\\*+([^*/]|[\\r\\n])))*\\*+\\//g") is now let blockCommentsRe = %re("/\/\*([^*]|[\r\n]|(\*+([^*/]|[\r\n])))*\*+\//g").

Alpha 1

Compiler

🚀 New Feature

• Add support for @new @variadic (see #5364)
• New records with @optional fields #5423 #5452

🐛 Bug Fix

• Classify bigint correctly #5351

💥 Breaking Change

• @bs.send.pipe is now removed. Earlier it was deprecated.
• Missing labels in function application is now an error (https://forum.rescript-lang.org/t/ann-more-strict-checks-in-missed-labels/2117).
• Fix Js.String.match_ return type #5070

🏠 [Internal]

• Proper M1 support (CI now supports M1 native builds)

Syntax

🚀 New Feature

• Doc comments /** ... */ are now supported. Inernally, they are attributes, so are only valid at positions where @foo is allowed, or a syntax error is given. Similarly for module-level /*** comments */ that can go where @@attributes go.

🐛 Bug Fix

• Fix printing for inline nullary functor types #477
• Fix stripping of quotes for empty poly variants #474
• Implement syntax for arity zero vs arity one in uncurried application in #139
• Fix parsing of first class module exprs as part of binary/ternary expr in #256
• Fix formatter hanging on deeply nested function calls #261

💥 Breaking Change

• Remove parsing of "import" and "export" which was never officially supported.

Libraries

💥 Breaking Change

• Removed printing modules (Printf, Format etc) and related functions. Details of files added/removed: 0fd8bb0.
• There could be issues with rescript-relay. See #5493.

💅 Polish

• Several Belt / Js libraries are now converted to ReScript syntax, with corresponding comments in Markdown format suitable for hovering. See #5361.

Playground

🏠 Internal

• Added jsoo_playground_main.ml as the rescript-lang.org playground bundle entrypoint

💥 Breaking Change

• * Removed Reason syntax support for the playground experience. See #5375

10.0.0-beta.2

* means potential breaking changes

New since beta.1:

• Changed Linux build to depend on GLIBC 2.28 again for compatibility with Debian 10.

New since alpha.1:

• Fixed crash in rescript build on Windows #5516
• Fixed rescript init command not working #5526
• * bsconfig.json does not support // line comments anymore
• * Externals without @val annotations do not work anymore, and externals with = "" give an error.
• * Regular expressions don't need escaping. E.g. let blockCommentsRe = %re("/\\/\\*([^*]|[\\r\\n]|(\\*+([^*/]|[\\r\\n])))*\\*+\\//g") is now let blockCommentsRe = %re("/\/\*([^*]|[\r\n]|(\*+([^*/]|[\r\n])))*\*+\//g").

Compiler

• Add support for @new @variadic (see #5364)
• New records with @optional fields #5423 #5452
• Classify bigint correctly #5351
• * @bs.send.pipe is now removed. Earlier it was deprecated.
• * Missing labels in function application is now an error (https://forum.rescript-lang.org/t/ann-more-strict-checks-in-missed-labels/2117).
• * Fix Js.String.match_ return type #5070
• Proper M1 support (CI now supports M1 native builds)

Syntax

• Doc comments /** ... */ are now supported. Inernally, they are attributes, so are only valid at positions where @foo is allowed, or a syntax error is given. Similarly for module-level /*** comments */ that can go where @@attributes go.
• Fix printing for inline nullary functor types #477
• Fix stripping of quotes for empty poly variants #474
• Implement syntax for arity zero vs arity one in uncurried application in #139
• Fix parsing of first class module exprs as part of binary/ternary expr in #256
• Fix formatter hanging on deeply nested function calls #261
• Remove parsing of "import" and "export" which was never officially supported.

Libraries

• * Removed printing modules (Printf, Format etc) and related functions. Details of files added/removed: 0fd8bb0.
• * There could be issues with rescript-relay. See #5493.
• Several Belt / Js libraries are now converted to ReScript syntax, with corresponding comments in Markdown format suitable for hovering. See #5361.

Playground

• Added jsoo_playground_main.ml as the rescript-lang.org playground bundle entrypoint
• * Removed Reason syntax support for the playground experience. See #5375

10.0.0-beta.1

* means potential breaking changes

New since alpha.1:

• Fixed crash in rescript build on Windows #5516
• Fixed rescript init command not working #5526
• * bsconfig.json does not support // line comments anymore
• * Externals without @val annotations do not work anymore, and externals with = "" give an error.
• * Regular expressions don't need escaping. E.g. let blockCommentsRe = %re("/\\/\\*([^*]|[\\r\\n]|(\\*+([^*/]|[\\r\\n])))*\\*+\\//g") is now let blockCommentsRe = %re("/\/\*([^*]|[\r\n]|(\*+([^*/]|[\r\n])))*\*+\//g").

Compiler

• Add support for @new @variadic (see #5364)
• New records with @optional fields #5423 #5452
• Classify bigint correctly #5351
• * @bs.send.pipe is now removed. Earlier it was deprecated.
• * Missing labels in function application is now an error (https://forum.rescript-lang.org/t/ann-more-strict-checks-in-missed-labels/2117).
• * Fix Js.String.match_ return type #5070
• Proper M1 support (CI now supports M1 native builds)

Syntax

• Doc comments /** ... */ are now supported. Inernally, they are attributes, so are only valid at positions where @foo is allowed, or a syntax error is given. Similarly for module-level /*** comments */ that can go where @@attributes go.
• Fix printing for inline nullary functor types #477
• Fix stripping of quotes for empty poly variants #474
• Implement syntax for arity zero vs arity one in uncurried application in #139
• Fix parsing of first class module exprs as part of binary/ternary expr in #256
• Fix formatter hanging on deeply nested function calls #261
• Remove parsing of "import" and "export" which was never officially supported.

Libraries

• * Removed printing modules (Printf, Format etc) and related functions. Details of files added/removed: 0fd8bb0.
• * There could be issues with rescript-relay. See #5493.
• Several Belt / Js libraries are now converted to ReScript syntax, with corresponding comments in Markdown format suitable for hovering. See #5361.

Playground

• Added jsoo_playground_main.ml as the rescript-lang.org playground bundle entrypoint
• * Removed Reason syntax support for the playground experience. See #5375

10.0.0-alpha.1

* means potential breaking changes

Compiler

• Add support for @new @variadic (see #5364)
• New records with @optional fields #5423 #5452
• Classify bigint correctly #5351
• * @bs.send.pipe is now removed. Earlier it was deprecated.
• * Missing labels in function application is now an error (https://forum.rescript-lang.org/t/ann-more-strict-checks-in-missed-labels/2117).
• * Fix Js.String.match_ return type #5070
• Proper M1 support (CI now supports M1 native builds)

Syntax

• Doc comments /** ... */ are now supported. Inernally, they are attributes, so are only valid at positions where @foo is allowed, or a syntax error is given. Similarly for module-level /*** comments */ that can go where @@attributes go.
• Fix printing for inline nullary functor types #477
• Fix stripping of quotes for empty poly variants #474
• Implement syntax for arity zero vs arity one in uncurried application in #139
• Fix parsing of first class module exprs as part of binary/ternary expr in #256
• Fix formatter hanging on deeply nested function calls #261
• Remove parsing of "import" and "export" which was never officially supported.

Libraries

• * Removed printing modules (Printf, Format etc) and related functions. Details of files added/removed: 0fd8bb0.
• * There could be issues with rescript-relay. See #5493.
• Several Belt / Js libraries are now converted to ReScript syntax, with corresponding comments in Markdown format suitable for hovering. See #5361.

Playground

• Added jsoo_playground_main.ml as the rescript-lang.org playground bundle entrypoint
• * Removed Reason syntax support for the playground experience. See #5375