12.0.0-beta.11

💥 Breaking Change

• Have String.charCodeAt return option<int>; add String.charCodeAtUnsafe. #7877
• Remove support of JSX children spread. #7869

🚀 New Feature

• Add Array.filterMapWithIndex to Stdlib. #7876

🐛 Bug fix

• Fix code generation for emojis in polyvars and labels. #7853
• Add reset to experimental_features to correctly reset playground. #7868
• Fix crash with @get on external of type unit => 'a. #7866
• Fix record type spreads in inline records. #7859

💅 Polish

• Reactivate optimization for length of array literals. #7872
• Float.isNaN: use Number.isNaN instead of global isNaN. #7874

🏠 Internal

• Playground: Add config options for experimental features and jsx preserve mode. #7865
• Clean up tests. #7861 #7871
• Add -runtime-path flag to bsc (and bsb), we are detecting the location of @rescript/runtime in cli/rescript.js based on runtime module resolution. #7858

12.0.0-beta.10

🚀 New Feature

• Support mapping more standard library types automatically to TS types via gentype, without requiring shims. #7842

🐛 Bug fix

• Show Stdlib.TypedArray completions for typed arrays. #7827
• Show Stdlib.Null and Stdlib.Nullable completions for Stdlib.null<'a> and Stdlib.nullable<'a> types, respectively. #7826
• Fix generation of interfaces for module types containing multiple type constraints. #7825
• JSX preserve mode: fix "make is not a valid component name". #7831
• Rewatch: include parser arguments of experimental features. #7836
• Stop mangling tagged templates and backquoted strings. #7841
• JSX v4: fix arity mismatch for @react.component with React.forwardRef. #7845

💅 Polish

• Improve error message for trying to define a type inside a function. #7843
• Refactor CLI to use spawn for better signal handling in watch mode. #7844

12.0.0-beta.9

💥 Breaking Change

• Extract ReScript runtime files from main rescript package to separate @rescript/runtime package. #7796
• Remove @rescript/std (in favor of @rescript/runtime). #7811

🚀 New Feature

• Add support for ArrayBuffer and typed arrays to @unboxed. #7788
• Experimental: Add let? syntax for unwrapping and propagating errors/none as early returns for option/result types. #7582
• Add support for shipping features as experimental, including configuring what experimental features are enabled in rescript.json. #7582

🐛 Bug fix

• Fix JS regex literal parsing in character classes. #7790
• Fix creating interface for functions with upper bounded polymorphic args. #7786

💅 Polish

• Make parser less strict around leading attributes. #7787
• Dedicated error message for ternary type mismatch. #7804
• Dedicated error message for passing a braced ident to something expected to be a record. #7806
• Hint about partial application when missing required argument in function call. #7807
• More autocomplete improvements involving modules and module types. #7795
• Autocomplete @react.componentWithProps attribute. #7812
• Add some missing iframe attributes to domProps. #7813
• Polish error message for inline record escaping scope. #7808
• Formatter: Change placement of closing > in JSX. #7803

🏠 Internal

• Build runtime with rewatch on Windows, too. #7794

12.0.0-beta.7

🚀 New Feature

• Add markdown divider between module doc and module type in hover information. #7775
• Show docstrings before type expansions on hover. #7774
• Autocomplete (and improved hovers) for first-class module unpacks. #7780

🐛 Bug fix

• Preserve @as(...) decorator on record fields when creating interface. #7779
• Fix parse error with nested record types and attributes on the field name that has the nested record type. #7781
• Fix ppx resolution with package inside monorepo. #7776
• Fix 'Unbound module type' errors that occurred when trying to async import modules. #7783

💅 Polish

• Allow skipping the leading pipe in variant definition with a leading constructor with an attribute. #7782
• Better error message (and recovery) when using a keyword as a record field name. #7784

12.0.0-beta.6

💥 Breaking Change

• rescript format no longer accepts --all. All (non-dev) files of the current rescript.json are now formatted by default. #7752

🚀 New Feature

• Add new Stdlib helpers: String.capitalize, String.isEmpty, Dict.size, Dict.isEmpty, Array.isEmpty, Map.isEmpty, Set.isEmpty. #7516

🐛 Bug fix

• Fix issue with ast conversion (for ppx use) on functions with attributes on first argument. #7761

💅 Polish

• rescript format now has a --dev flag that works similar to rescript clean. #7752
• rescript clean now will clean an individual project (see #7707). #7752
• rescript clean will log multiple in-source extensions if present. #7769

🏠 Internal

• AST: Use jsx_tag_name instead of Longindent.t to store jsx tag name. #7760

12.0.0-beta.5

🐛 Bug fix

• Fix formatting of nested records in .resi files. #7741
• Don't format and don't check formatting of dependencies. #7748
• Fix rescript-editor-analysis semanticTokens returning invalid JSON in certain cases. #7750

📝 Documentation

• Update jsx schema configuration. #7755

💅 Polish

• Read package name from rescript.json if package.json is absent. #7746

🏠 Internal

• Add token viewer to res_parser. #7751
• Refactor jsx mode in Scanner. #7751

12.0.0-beta.4

🐛 Bug fix

• Fix error message that falsely suggested using coercion when it wouldn't work. #7721
• Fix hang in rescript-editor-analysis.exe codeAction that sometimes prevented ReScript files from being saved in VS Code. #7731
• Fix formatter removing () from functor type. #7735
• Rewatch: don't compile dev-dependencies of non local dependencies with --dev. #7736

💅 Polish

• Apply heuristic to suggest using JSX fragments where we guess that might be what the user wanted. #7714
• Show deprecation warnings for bs-dependencies etc. for local dependencies only. #7724
• Add check for minimum required node version. #7723
• Use more optional args in stdlib and deprecate some functions. #7730
• Improve error message for when trying to do dot access on an option/array. #7732

12.0.0-beta.3

💥 Breaking Change

• Result.getOrThrow now throws a JS error instead of a Not_found ReScript exception. #7630
• Remove rescript dump command. bsc can be used directly to dump the contents of a .cmi file instead if needed. #7710

🚀 New Feature

• Add optional message argument to Result.getOrThrow and improve default error message. #7630
• Add RegExp.escape binding. #7695

🐛 Bug fix

• Fix --create-sourcedirs generation with for a single project. #7671
• Fix rewatch not recompiling on changes on Windows. #7690
• Fix locations of regex literals. #7683
• Fix async React component compilation. #7704
• Fix @this with async keyword. #7702

💅 Polish

• Configuration fields bs-dependencies, bs-dev-dependencies and bsc-flags are now deprecated in favor of dependencies, dev-dependencies and compiler-flags. #7658
• Better error message if platform binaries package is not found. #7698
• Hint in error for string constants matching expected variant/polyvariant constructor. #7711
• Polish arity mismatch error message a bit. #7709
• Suggest related functions with the expected arity in errors when it makes sense. #7712
• Improve error when a constructor expects an inline record. #7713
• Remove @meth attribute. #7684

🏠 Internal

• Add rust linting to CI with clippy. #7675
• AST: use Typ.arrows for creation, after the refactoring of arrow types. #7662
• Don't skip Stdlib docstring tests. #7694
• Remove all leftovers of pinned-dependencies handling. #7686
• Add rust-version field to Rewatch's Cargo.toml. #7701

12.0.0-beta.2

💥 Breaking Change

• Rust implementation of the rescript format command. Command line options changed from -all, -check and -stdin to --all, --check and --stdin compared to the legacy implementation. #7603

🚀 New Feature

• Add experimental command to rescript-tools for extracting all ReScript code blocks from markdown, either a md-file directly, or inside of docstrings in ReScript code. #7623

🐛 Bug fix

• Fix typeof parens on functions. #7643
• Rewatch: Add --dev flag to clean command. #7622
• Rewatch: Use root package suffix in clean log messages. #7648
• Fix inside comment printing for empty dict. #7654
• Fix I/O error message when trying to extract extra info from non-existing file. #7656
• Fix fatal error when JSX expression used without configuring JSX in rescript.json. #7656
• Rewatch: Only allow access to "bs-dev-dependencies" from "type": "dev" source files. #7650

💅 Polish

• Add missing backtick and spaces to Belt.Map.map doc comment. #7632
• AST: store the attributes directly on function arguments. #7660

🏠 Internal

• Remove internal/unused -bs-v flag. #7627
• Remove unused -bs-D and -bs-list-conditionals flags. #7631
• Remove obsolete jsx options. #7633
• Remove obsolete option -bs-unsafe-empty-array. #7635
• Clean up config.ml. #7636
• Rewatch: simplify getting bsc path. #7634
• Rewatch: only get "type": "dev" source files for local packages. #7646
• Rewatch: add support for rescript -w for compatibility. #7649

12.0.0-beta.1

🚀 New Feature

• Add experimental command to rescript-tools for formatting all ReScript code blocks in markdown. Either in a markdown file directly, or inside of docstrings in ReScript code. #7598
• Add String.getSymbolUnsafe back to Stdlib. #7626

💅 Polish

• Add a warning if the name in package.json does not match the name in rescript.json. #7604

🏠 Internal

• Remove uncurried handling from rewatch. #7625