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fix(resolver): honor package.json#type for .jsx/.tsx extensions (#9690)#9699

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fix(resolver): honor package.json#type for .jsx/.tsx extensions (#9690)#9699
graphite-app[bot] merged 1 commit into
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fix/9690-tsx-jsx-package-json-type

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@IWANABETHATGUY

@IWANABETHATGUY IWANABETHATGUY commented Jun 9, 2026

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oxc_resolver only resolves module_type from package.json#type for .js/.ts extensions, following the Node.js ESM spec which has no native .jsx/.tsx. rolldown relied on that module_type, so a .tsx entry under "type": "module" fell back to Unknown instead of EsmPackageJson.

This made identical .ts and .tsx sources emit different CJS interop for a default import of an external CJS module: the .ts file got node-mode __toESM(mod, 1) while the .tsx file got __toESM(mod), breaking mod.default at runtime.

As a bundler, rolldown already treats .jsx/.tsx as js-like extensions, so fall back to reading the nearest package.json#type directly when oxc reports no module_type, keeping all js-like extensions consistent (and matching esbuild, which emits __toESM(require(...), 1) for both).

closed #9690

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codspeed-hq Bot commented Jun 9, 2026

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Merging this PR will not alter performance

✅ 4 untouched benchmarks
⏩ 10 skipped benchmarks1


Comparing fix/9690-tsx-jsx-package-json-type (7923b0d) with main (eec3506)

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Footnotes

  1. 10 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports.

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@IWANABETHATGUY IWANABETHATGUY force-pushed the fix/9690-tsx-jsx-package-json-type branch from 1d83558 to e340989 Compare June 10, 2026 02:31
@hyf0 hyf0 assigned sapphi-red and unassigned IWANABETHATGUY Jun 10, 2026
Comment thread crates/rolldown/tests/rolldown/issues/9690/_test.mjs Outdated
@IWANABETHATGUY IWANABETHATGUY force-pushed the fix/9690-tsx-jsx-package-json-type branch from 57cb539 to 7923b0d Compare June 10, 2026 11:07

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IWANABETHATGUY commented Jun 10, 2026

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Merge activity

  • Jun 10, 11:17 AM UTC: The merge label 'graphite: merge-when-ready' was detected. This PR will be added to the Graphite merge queue once it meets the requirements.
  • Jun 10, 11:17 AM UTC: IWANABETHATGUY added this pull request to the Graphite merge queue.
  • Jun 10, 11:23 AM UTC: Merged by the Graphite merge queue.

… (#9699)

`oxc_resolver` only resolves `module_type` from `package.json#type` for `.js`/`.ts` extensions, following the Node.js ESM spec which has no native `.jsx`/`.tsx`. rolldown relied on that `module_type`, so a `.tsx` entry under `"type": "module"` fell back to `Unknown` instead of `EsmPackageJson`.

This made identical `.ts` and `.tsx` sources emit different CJS interop for a default import of an external CJS module: the `.ts` file got node-mode `__toESM(mod, 1)` while the `.tsx` file got `__toESM(mod)`, breaking `mod.default` at runtime.

As a bundler, rolldown already treats `.jsx`/`.tsx` as js-like extensions, so fall back to reading the nearest `package.json#type` directly when oxc reports no `module_type`, keeping all js-like extensions consistent (and matching esbuild, which emits `__toESM(require(...), 1)` for both).

closed #9690
@graphite-app graphite-app Bot force-pushed the fix/9690-tsx-jsx-package-json-type branch from 7923b0d to 289c520 Compare June 10, 2026 11:18
@graphite-app graphite-app Bot merged commit 289c520 into main Jun 10, 2026
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@graphite-app graphite-app Bot deleted the fix/9690-tsx-jsx-package-json-type branch June 10, 2026 11:23
@shulaoda shulaoda mentioned this pull request Jun 11, 2026
@rolldown-guard rolldown-guard Bot mentioned this pull request Jun 11, 2026
shulaoda pushed a commit that referenced this pull request Jun 11, 2026
## [1.1.1] - 2026-06-11

### 🚀 Features

- ecmascript_utils: introduce AstFactory for AST construction (#9682) by @hyf0
- drop no-op init calls for empty wrapped-ESM modules (#9678) by @IWANABETHATGUY

### 🐛 Bug Fixes

- resolver: honor package.json#type for .jsx/.tsx extensions (#9690) (#9699) by @IWANABETHATGUY
- hmr: report the full-reload reason for the invalidate-loop case (#9708) by @hyf0
- explicit `moduleSideEffects` from a hook must take priority over the `package.json#sideEffects` (#9688) by @sapphi-red
- keep the `rolldown-runtime` name for the standalone runtime chunk (#9685) by @shulaoda
- lazy-barrel: request all exports for entry barrels on first encounter (#9672) by @shulaoda
- finalizer: skip init_*() for tree-shaken wrapped ESM owners (#9669) by @IWANABETHATGUY
- order `chunk.imports` by execution order (#9654) by @chuganzy
- vite-resolve: preserve slash separators for Sass partial exports (#9546) by @cjc0013
- cross-chunk CJS wrapper shadowed by author-local binding (#9648) by @IWANABETHATGUY

### 🚜 Refactor

- precompute wrapped-ESM init metadata in generate stage (#9712) by @IWANABETHATGUY
- ecmascript_utils: fold construction ext traits onto AstFactory and delete AstSnippet (#9702) by @hyf0
- finalizer: finish ScopeHoistingFinalizer migration to AstFactory (#9701) by @hyf0
- finalizer: migrate module_finalizers/mod.rs to AstFactory (#9700) by @hyf0
- hmr: migrate hmr finalizer to AstFactory (#9695) by @hyf0
- plugin: migrate vite_build_import_analysis to AstFactory (#9693) by @hyf0
- scanner: migrate tweak_ast_for_scanning to AstFactory (#9683) by @hyf0
- always split runtime module first (#9419) by @IWANABETHATGUY

### 📚 Documentation

- tsconfig: correct auto-discovery resolution to match TypeScript (#9714) by @shulaoda
- design: plan to unify all internal AST construction (#9673) by @hyf0
- tsconfig: align reference resolution docs with TypeScript behavior (#9641) by @shulaoda

### ⚡ Performance

- avoid per-module join Strings in scope-hoisting concatenation (#9645) by @Boshen
- avoid intermediate Strings in the ESM export clause (#9644) by @Boshen
- reuse a scratch buffer for facade namespace names in the scanner (#9642) by @Boshen
- reuse the import-matching tracker stack across named imports (#9643) by @Boshen
- avoid cloning the per-chunk export-items map in render_chunk_exports (#9639) by @Boshen
- avoid CompactStr allocation in sorted-exports membership check (#9640) by @Boshen

### 🧪 Testing

- add more `moduleSideEffects` precedence tests (#9689) by @sapphi-red
- 9651: drop shimMissingExports from regression fixture (#9674) by @IWANABETHATGUY

### ⚙️ Miscellaneous Tasks

- update react repo links (#9711) by @iiio2
- remove outdated pnpm configurations (#9666) by @btea
- deps: update github actions to v2.81.5 (#9665) by @renovate[bot]
- testing: migrate test harness off deprecated inlineDynamicImports (#9710) by @IWANABETHATGUY
- hmr: delete commented-out dead code left from old register-module codegen (#9707) by @hyf0
- deps: update napi-rs toolchain (#9706) by @shulaoda
- deps: update rollup submodule for tests to v4.61.1 (#9676) by @rolldown-guard[bot]
- deps: update test262 submodule for tests (#9677) by @rolldown-guard[bot]
- deps: update oxc to 0.135.0 (#9670) by @Boshen
- pass ALGOLIA_APP_ID and ALGOLIA_API_KEY to void deploy (#9667) by @Boshen
- deps: update github actions (#9662) by @renovate[bot]
- deps: update rust crates (#9663) by @renovate[bot]
- deps: update rolldown-plugin-dts to v0.25.2 (#9661) by @renovate[bot]
- deps: update typos to v1.47.2 (#9660) by @renovate[bot]
- deps: update docs dependencies (#9657) by @bddjr
- deps: update typos to v1.47.1 (#9655) by @renovate[bot]
- deploy website in its own workflow, only on docs output change (#9650) by @Boshen
- publish to pkg.pr.new add pm and `commentWithDev` option (#9638) by @btea

### ❤️ New Contributors

* @chuganzy made their first contribution in [#9654](#9654)
* @cjc0013 made their first contribution in [#9546](#9546)
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[Bug]: CJS default import emits __toESM(mod, 1) in .ts files but __toESM(mod) in .tsx files

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