npm rolldown 1.2.1
v1.2.1
on Node.js NPM

3 hours ago

[1.2.1] - 2026-07-29

🚀 Features

🐛 Bug Fixes

  • external: keep __toESM when the importing module is tree-shaken (#10516) by @IWANABETHATGUY
  • dev: resolve re-exports from externals through a real import (#10489) by @tbvjaos510
  • code-splitting: route CJS barrel initialization per consumer (#10488) by @hyfdev
  • error: align filename-pattern diagnostics with Rollup's wording (#10501) by @IWANABETHATGUY
  • plugin: validate emitted prebuilt-chunk file names (#10399) by @IWANABETHATGUY
  • code-splitting: point a two-argument dynamic import at the chunk that holds the module (#10479) by @hyfdev
  • common: align is_path_fragment with Rollup's isPathFragment (#10398) by @IWANABETHATGUY
  • code-splitting: never name an internal chunk export then (#10480) by @hyfdev
  • code-splitting: avoid creating call-site-triggered entry facades (#10485) by @hyfdev
  • code-splitting: collect top-level eager order reasons in every strict build (#10463) by @hyfdev
  • code-splitting: let a cross-chunk dynamic importer carry the order trigger (#10456) by @hyfdev
  • code-splitting: avoid the dynamic-entry facade when the same-chunk collapse carries the trigger (#10433) by @hyfdev
  • binding: forward resolveId options.kind to callable builtin plugins (#10440) by @martijnwalraven
  • dev: keep the export name of export * as ns from (#10476) by @tbvjaos510
  • code-splitting: only split an entry facade when something else can load its chunk (#10441) by @hyfdev
  • code-splitting: fold the runtime chunk back after order lowering (#10414) by @hyfdev
  • runtime: don't leave default undefined for cjs that fakes __esModule (#10453) by @IWANABETHATGUY
  • import-glob: escape generated string literals (#10438) by @shantanuraj
  • preserve-modules: don't assume every chunk mirrors a module (#10442) by @hyfdev
  • filter: treat missing hook inputs as non-matches, not panics (#10443) by @IWANABETHATGUY
  • code-splitting: keep CommonJS modules wrapped under strict execution order (#10405) by @hyfdev
  • code-splitting: align dynamicImports metadata with the rewritten import() specifier (#10430) by @hyfdev
  • dev: skip user plugin hooks for ?rolldown-lazy proxy modules (#10426) by @unknownjedi
  • treeshake: preserve side-effect-free spread arguments in manual-pure chains (#10432) by @IWANABETHATGUY
  • treeshake: preserve eagerly evaluated child effects of manual pure chains (#10427) by @Nic-Polumeyv
  • code-splitting: initialize pure definers behind star re-export barrels under strict execution order (#10409) by @hyfdev
  • resolveId: reject string id filters (must be a RegExp) (#10412) by @IWANABETHATGUY
  • code-splitting: collect eager order reasons for on-demand wrapping (#10387) by @hyfdev
  • rolldown: apply output.paths to CJS export-star of external modules (#10406) by @IWANABETHATGUY
  • dev: sourcemaps of lazily compiled chunks (#10386) by @tbvjaos510
  • plugin: validate emitted file names at emitFile time (#10377) by @Nic-Polumeyv
  • guarantee tokio runtime release when close rejects (#10381) by @shulaoda
  • code-splitting: make strict transitive init registration deterministic and constant-time (#10320) by @hyfdev
  • pair tokio runtime acquire and release on wasm to prevent premature shutdown (#10363) by @shulaoda
  • don't body-demand modules from simulated facade chunk includes (#10351) by @IWANABETHATGUY
  • tracing: invalid RD_LOG filter and RD_LOG_OUTPUT=json no longer panic (#10343) by @Brooooooklyn
  • code-splitting: treat class definition-time global reads as order-sensitive (#10322) by @hyfdev
  • code-splitting: deconflict force-included runtime helper statements (#10336) by @hyfdev
  • binding: forward all missing parallel JS plugin hooks (#10345) by @Brooooooklyn
  • code-splitting: re-derive chunk exec order after the runtime sweep (#10334) by @hyfdev
  • types: add undefined to ExistingRawSourceMap optional properties (#10355) by @ocavue
  • magic-string: validate relocate ranges before rewiring (#10327) by @IWANABETHATGUY
  • add EMPTY_IMPORT_META warning for non-node CJS output (#10222) by @sapphi-red
  • call resolveFileUrl in a deterministic order (#10330) by @sapphi-red
  • magic-string: refuse repeated sendMagicString on a consumed instance (#10331) by @IWANABETHATGUY
  • magic-string: refuse to use a MagicString after sendMagicString consumed it (#10326) by @IWANABETHATGUY
  • magic-string: reject non-contiguous moves before rewiring the chunk list (#10311) by @IWANABETHATGUY
  • handle ./foo/bar glob pattern the same as foo/bar (#10313) by @sapphi-red
  • magic-string: throw instead of panicking when append/prepend splits an edited chunk (#10301) by @IWANABETHATGUY
  • output: skip separator for empty hoisted functions (#10310) by @hyfdev
  • magic-string: don't report a change when edits cancel out (#10299) by @IWANABETHATGUY
  • sourcemap: map wrapped imported callees (#10288) by @hyfdev
  • magic-string: count positional inserts at index 0 on an empty source (#10306) by @IWANABETHATGUY
  • magic-string: return UTF-16 code units from length() (#10295) by @IWANABETHATGUY
  • output: skip separator for empty import prelude (#10289) by @hyfdev

🚜 Refactor

📚 Documentation

⚡ Performance

🧪 Testing

  • code-splitting: pin CJS barrel fallback triggers and flag-off equivalence (#10514) by @hyfdev
  • plugin: cover chunk fileName, absolute chunk name, and Windows drive names (#10400) by @IWANABETHATGUY
  • code-splitting: cover a single-chunk dynamic import of a wrapped module (#10505) by @hyfdev
  • file: remove the unused .dynamic_import fixture (#10481) by @hyfdev
  • treeshake: reduce manual-pure fixture to a minimal smoke test, move matrix to unit tests (#10436) by @IWANABETHATGUY
  • dev: run vite playgrounds under bundled dev (test-serve-bundled) (#10434) by @h-a-n-a
  • stop snapshots from silently hiding user code inside the runtime region (#10431) by @hyfdev
  • wasi: add tokio runtime lifecycle regression test (#10379) by @shulaoda
  • dev: expect preserved hot.data in hmr-whole-chain-dispose (#10380) by @h-a-n-a
  • code-splitting: pin flag-off wrapped-esm init emission (#10324) by @hyfdev
  • sourcemap: fix Windows-only failures in composition fixtures (#10368) by @shulaoda
  • generated-code: mark assert external in symbols_ns2 for deterministic output (#10339) by @hyfdev
  • code-splitting: cover entries-aware strict init cycle (#10307) by @hyfdev
  • make just setup-vite the only entry point that touches vite/ (#10332) by @shulaoda
  • vite-tests: reuse the shared root vite checkout (#10325) by @shulaoda
  • test-dev-server: drop the vite submodule, track rolldown-canary (#10319) by @shulaoda
  • vite-tests: track the latest rolldown-canary rebased onto vite main (#10318) by @shulaoda
  • unify Vite in vite-test and test-dev-server (#10293) by @h-a-n-a

⚙️ Miscellaneous Tasks

❤️ New Contributors

Co-authored-by: shulaoda 165626830+shulaoda@users.noreply.github.com

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