dart2esm 0.1.1

A Dart-to-native-ESM compiler that emits clean modern JavaScript modules.

0.1.1

• Bundle the minimal Dart 3.12.2 Kernel reader required by the compiler instead of cloning the complete Dart SDK as a Git dependency.
• Pin the matching hosted _fe_analyzer_shared release and limit activation to Dart 3.12, whose Kernel binary format this release supports.
• Add a minimal pub.dev package manifest that excludes development fixtures and JavaScript test tooling from the distributed archive.

0.1.0

• Compile Dart source or Kernel .dill input into native ECMAScript modules.
• Use Dart CFE/Kernel as the frontend through dart compile kernel and package:kernel.
• Emit ESM exports for the entry library, including top-level functions, variables, classes, enums, records, constructors, and supported static members.
• Lower modern Dart syntax produced by CFE, including collection control-flow, null-aware operators, cascades, pattern destructuring, switch expressions, sync generators, async generators, and await for.
• Select neutral, browser, or Node platform lowering without a redundant JavaScript target abstraction.
• Emit canonical module-level constructor tear-offs instead of duplicating function bodies at every reference.
• Link runtime helpers by referenced symbol instead of emitting whole helper families, and validate the transitive dependency closure during compilation.
• Discover reserved runtime names from actual declarations rather than a manually synchronized global-name list.
• Emit Node-backed dart:io through hoisted static node: imports, add usable link and stdin operations, and reject unimplemented IO methods at compile time instead of generating broken calls.
• Split dart:io lowering into pure ECMAScript, Web API, and Node capability groups with compile-time platform enforcement.
• Lower client HttpClient requests to Fetch/Headers streams and WebSocket.connect to the WebSocket Web API in browser and modern Node runtimes.
• Compile browser-targeted dart:io through VM Kernel while retaining the DDC fallback for web-only SDK libraries.
• Replace same-thread isolate simulation with real Node Workers and browser module Workers for top-level Isolate.spawn and Isolate.run entries, using MessageChannel-backed SendPort delivery and structured-clone validation.
• Reject worker-incompatible isolate closures and unsupported message shapes instead of silently sharing the main module heap.
• Remove the numeric dart:ffi pointer simulation. FFI now fails at compile time until an explicit native-addon or WebAssembly ABI backend exists.
• Add focused golden and runtime fixtures that compare Dart VM behavior with Node running generated ESM.

0.0.0

• Reserve the dart2esm package name.
• Add a placeholder command-line executable.