Anber/wyw-in-js @wyw-in-js/transform@2.0.0-alpha.0

on GitHub

Major Changes

• bd2a46a: WyW-in-JS packages are now ESM-only and require Node.js >= 22.0.0.

  Breaking changes in v2:

  • CJS require() package entrypoints were removed; migrate configs/tooling to ESM (import() / .mjs).
  • Eval moved to the async ESM runner-based pipeline (vm.SourceTextModule + broker RPC), which is now the default path in v2.
  • Eval IPC and Babel preset config handling are stricter:
    • unsupported values in __wywPreval now fail explicitly instead of being silently coerced through JSON
    • function-valued preset/plugin options are supported when loaded from config files, while inline non-serializable options now error with migration guidance
    • eval.globals encoding and invalidation are more predictable and reject unsupported values earlier
  • require() inside eval now follows fallback semantics controlled by eval.require (warn-and-run / error / off).

  This release also updates the published bundler integrations, adapter coverage,
  and migration/docs around the v2 evaluator contract, and includes cache and
  warm-runner reuse fixes to keep the new evaluator on the expected performance
  path.

  Migration guide: https://wyw-in-js.dev/migration/v2

• d553b68: Complete the v2 Oxc migration across the core transform and evaluator pipeline.

  This cutover moves the runtime transform path to the Oxc-backed implementation, including module analysis, preeval rewrites, dangerous-code removal, processor application, template dependency extraction, shaker, collect, emit, and the async ESM evaluator flow.

  The public configuration contract is now Oxc-first, with oxcOptions, EvalRule.oxcOptions, and the hybrid resolver mode available across the updated packages. Processor integrations now rely on the engine-neutral AstService surface, and the migration includes cache, concurrency, and hot-path performance fixes needed to keep downstream behavior stable after the cutover. @wyw-in-js/babel-preset stays available only as a deprecated compatibility wrapper around the Oxc pipeline.

Minor Changes

• 7754792: Expose the public Oxc configuration surface for the v2 transform path.

  This introduces oxcOptions, per-rule EvalRule.oxcOptions, and the opt-in hybrid eval resolver mode contract used by the Oxc-first pipeline. The default resolver remains bundler.

• 69004e7: Add a supported processor diagnostics seam that lets library-owned processors emit structured non-fatal warnings through WyW.

  This adds:

  • BaseProcessor.addDiagnostic() and typed diagnostics helpers in @wyw-in-js/processor-utils
  • normalized diagnostics output from @wyw-in-js/transform
  • diagnostics reporting in @wyw-in-js/vite and @wyw-in-js/cli

  Existing hard failures and metadata sidecar behavior stay intact.

• 1a72b47: Inline statically resolvable imported literals, fixed objects, compiled TypeScript enum objects, zero-argument helper returns, compound component alias metadata, same-module and post-declaration alias metadata, primitive processor metadata, and static metadata helper chains during Oxc pre-evaluation. The optimization is controlled by the opt-in features.staticImportValues flag.

  Cache per-file static metadata pre-evaluation results so multiple static exports from the same module do not repeat the same processor pre-evaluation work.

• 69004e7: Add opt-in metadata manifest output across @wyw-in-js/shared, @wyw-in-js/transform, @wyw-in-js/vite, and @wyw-in-js/cli.

  When outputMetadata is enabled:

  • @wyw-in-js/transform now returns normalized, public metadata alongside the existing transform result.
  • @wyw-in-js/vite emits .wyw-in-js.json sidecar assets during build.
  • @wyw-in-js/cli writes matching .wyw-in-js.json sidecar files and supports an --output-metadata flag.

  This keeps default JS/CSS output unchanged while exposing stable metadata artifacts for CLI, Vite, and transform consumers.

Patch Changes

• d553b68: Fix several remaining Oxc parity gaps around processor-added imports, hoisted template dependencies, CommonJS export analysis, runtime source map composition, and live-binding CommonJS emit behavior.
• Updated dependencies
  • @wyw-in-js/processor-utils@2.0.0-alpha.0
  • @wyw-in-js/shared@2.0.0-alpha.0