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v1.2.0
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Wakaru v1.2.0

This release focuses on better recovery for modern JavaScript patterns, more reliable bundle output, and stronger correctness checks around semantic edge cases.

Highlights

  • Added recovery for tagged template literals, modern enum IIFEs, destructured parameter aliases, switch statements from ternary chains, and more for...of loop shapes.
  • Improved optional chaining and nullish coalescing restoration, including loose Babel-style patterns and mixed member chains.
  • Expanded Babel/TypeScript/SWC helper recovery for object rest/spread, array spread/rest, async/regenerator output, and imported Babel helpers.
  • Improved webpack output cleanup, including namespace getters, require.n interop, AMD/module decorators, global runtime access, and webpack5 export getter semantics.
  • Added a WASM-powered web playground and project website.
  • Added debug/profiling spans for per-rule and webpack5 detection performance analysis.
  • Added Test262 round-trip correctness tooling and baseline summaries to track semantic preservation over time.

Correctness and Safety

This release tightens several semantic edge cases:

  • Preserves top-level vars referenced through indirect eval.
  • Avoids unsafe TDZ rewrites in parameters, constructors, for...of, class handling, and var modernization.
  • Preserves strict directives and class semantics in minimal mode.
  • Improves binding-context checks so rule matchers do not accidentally rewrite shadowed identifiers.

No Breaking Changes

No user-facing breaking changes are expected. Existing CLI usage should continue to work.

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