fix(rolldown_plugin_lazy_compilation): use loadExports for fetched proxy to preserve original export names by h-a-n-a · Pull Request #9132 · rolldown/rolldown

h-a-n-a · 2026-04-16T09:24:46Z

Summary

When a dynamic import target ends up in a ChunkKind::Common chunk (shared across multiple entry boundaries), rolldown minifies all its export names. The lazy compilation fetched proxy previously did const mod = await import(...); return mod, passing the raw chunk namespace to user code — so sel.foo became undefined because the actual key was a short alias like $.

Fix: switch the fetched proxy template to use __rolldown_runtime__.loadExports() instead of returning the chunk namespace directly. The runtime registry stores exports with their original names, bypassing the mangled chunk-level exports.

Test plan

Added packages/test-dev-server/tests/playground/lazy-issue-9312

We should probably come up with a lazy compilation test infra that makes writing multiple test cases easier.

h-a-n-a · 2026-04-16T09:24:59Z

fix(dev/lazy): fix exports of lazy requests in lazy chunks #9249 : 2 dependent PRs (#9275 , #9303 )
fix(rolldown_plugin_lazy_compilation): use loadExports for fetched proxy to preserve original export names #9132 👈 (View in Graphite)
fix(dev/lazy): lazily compiled modules should be watched #9301
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netlify · 2026-04-16T09:25:00Z

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graphite-app · 2026-05-11T09:53:59Z

Merge activity

May 11, 9:53 AM UTC: h-a-n-a added this pull request to the Graphite merge queue.
May 11, 9:59 AM UTC: Merged by the Graphite merge queue.

…oxy to preserve original export names (#9132) ## Summary When a dynamic import target ends up in a `ChunkKind::Common` chunk (shared across multiple entry boundaries), rolldown minifies all its export names. The lazy compilation fetched proxy previously did `const mod = await import(...); return mod`, passing the raw chunk namespace to user code — so `sel.foo` became `undefined` because the actual key was a short alias like `$`. Fix: switch the fetched proxy template to use `__rolldown_runtime__.loadExports()` instead of returning the chunk namespace directly. The runtime registry stores exports with their original names, bypassing the mangled chunk-level exports. ## Test plan Added `packages/test-dev-server/tests/playground/lazy-issue-9312` We should probably come up with a lazy compilation test infra that makes writing multiple test cases easier.

@shulaoda

## [1.0.1] - 2026-05-13 ### 🚀 Features - experimental/lazy-barrel: advice on oversized barrel modules (#9236) by @shulaoda - rolldown: inline optional-chain enum access (#9379) by @Dunqing - chunk-optimization: dedupe already-loaded dynamic deps (#9305) by @IWANABETHATGUY - binding: call moduleParsed hook in ParallelJsPlugin (#9318) by @jaehafe ### 🐛 Bug Fixes - transform: enable `enum_eval` for `transformSync` and vite TS transform (#9325) by @Dunqing - error: remove severity prefix from diagnostic messages (#9262) by @Kyujenius - deps: pin pnpm to 10.23.0 to work around catalog mismatch on Netlify (#9364) by @shulaoda - ci: pin mimalloc-safe to 0.1.58 (#9361) by @shulaoda - dev/lazy: fix exports of lazy requests in lazy chunks (#9249) by @h-a-n-a - rolldown_plugin_vite_resolve: handle errors in `resolveSubpathImports` callback (#9355) by @sapphi-red - rolldown_plugin_lazy_compilation: use loadExports for fetched proxy to preserve original export names (#9132) by @h-a-n-a - common: include offending index in HybridIndexVec panic message (#9296) by @SAY-5 ### 🚜 Refactor - ecmascript: extract semantic_builder_for_transform helper (#9326) by @Dunqing - test: extract reusable static-import-cycle helper (#9332) by @IWANABETHATGUY ### 📚 Documentation - clarify scope of `topLevelVar` (#9380) by @IWANABETHATGUY - meta/design: add ast-mutation design doc (#9338) by @hyf0 - feat: add ai policy in contribution guide (#9315) by @mdong1909 ### ⚡ Performance - binding: enable mimalloc v3 to reduce idle memory (#9349) by @shulaoda ### 🧪 Testing - mcs: cover require() in `$initial` group (#9376) by @hyf0 - add regression for CJS facade chunk merge into entry (#9351) by @IWANABETHATGUY ### ⚙️ Miscellaneous Tasks - switch prepare-release to manual dispatch with version input (#9383) by @shulaoda - migrate `@rolldown/pluginutils` to `rolldown/plugins` (#9317) by @shulaoda - deps: pin libmimalloc-sys2 to 0.1.54 (#9372) by @shulaoda - replace `igorskyflyer/action-readfile` with `cat` (#9369) by @sapphi-red - deps: update test262 submodule for tests (#9371) by @rolldown-guard[bot] - use app token for test dep update PRs (#9368) by @sapphi-red - replace some actions with gh commands (#9367) by @sapphi-red - replace action-semantic-pull-request with inline regex (#9366) by @sapphi-red - remove pull_request_target workflows (#9188) by @Boshen - deps: upgrade oxc to 0.130.0 (#9360) by @shulaoda - deps: update github actions (major) (#9348) by @renovate[bot] - deps: update github actions (#9341) by @renovate[bot] - deps: update rust crates (#9344) by @renovate[bot] - deps: update crate-ci/typos action to v1.46.1 (#9357) by @renovate[bot] - deps: update npm packages (#9343) by @renovate[bot] - deps: update pnpm to v10.33.4 (#9347) by @renovate[bot] - deps: update dependency rolldown-plugin-dts to ^0.25.0 (#9346) by @renovate[bot] - .claude: add rolldown-repl encoder, rename decode skill (#9352) by @IWANABETHATGUY - deps: update crate-ci/typos action to v1.46.0 (#9345) by @renovate[bot] - deps: update napi to v3.8.6 (#9342) by @renovate[bot] - deps: update dependency vite-plus to v0.1.20 (#9340) by @renovate[bot] - enable rollup chunking-form test (#9335) by @IWANABETHATGUY - typo: fix typo in watcher options comment (#9324) by @thescripted ### ❤️ New Contributors * @Kyujenius made their first contribution in [#9262](#9262) * @SAY-5 made their first contribution in [#9296](#9296) * @thescripted made their first contribution in [#9324](#9324) Co-authored-by: shulaoda <[email protected]>

…oxy to preserve original export names (#9132) ## Summary When a dynamic import target ends up in a `ChunkKind::Common` chunk (shared across multiple entry boundaries), rolldown minifies all its export names. The lazy compilation fetched proxy previously did `const mod = await import(...); return mod`, passing the raw chunk namespace to user code — so `sel.foo` became `undefined` because the actual key was a short alias like `$`. Fix: switch the fetched proxy template to use `__rolldown_runtime__.loadExports()` instead of returning the chunk namespace directly. The runtime registry stores exports with their original names, bypassing the mangled chunk-level exports. ## Test plan Added `packages/test-dev-server/tests/playground/lazy-issue-9312` We should probably come up with a lazy compilation test infra that makes writing multiple test cases easier.

@shulaoda

## [1.0.1] - 2026-05-13 ### 🚀 Features - experimental/lazy-barrel: advice on oversized barrel modules (#9236) by @shulaoda - rolldown: inline optional-chain enum access (#9379) by @Dunqing - chunk-optimization: dedupe already-loaded dynamic deps (#9305) by @IWANABETHATGUY - binding: call moduleParsed hook in ParallelJsPlugin (#9318) by @jaehafe ### 🐛 Bug Fixes - transform: enable `enum_eval` for `transformSync` and vite TS transform (#9325) by @Dunqing - error: remove severity prefix from diagnostic messages (#9262) by @Kyujenius - deps: pin pnpm to 10.23.0 to work around catalog mismatch on Netlify (#9364) by @shulaoda - ci: pin mimalloc-safe to 0.1.58 (#9361) by @shulaoda - dev/lazy: fix exports of lazy requests in lazy chunks (#9249) by @h-a-n-a - rolldown_plugin_vite_resolve: handle errors in `resolveSubpathImports` callback (#9355) by @sapphi-red - rolldown_plugin_lazy_compilation: use loadExports for fetched proxy to preserve original export names (#9132) by @h-a-n-a - common: include offending index in HybridIndexVec panic message (#9296) by @SAY-5 ### 🚜 Refactor - ecmascript: extract semantic_builder_for_transform helper (#9326) by @Dunqing - test: extract reusable static-import-cycle helper (#9332) by @IWANABETHATGUY ### 📚 Documentation - clarify scope of `topLevelVar` (#9380) by @IWANABETHATGUY - meta/design: add ast-mutation design doc (#9338) by @hyf0 - feat: add ai policy in contribution guide (#9315) by @mdong1909 ### ⚡ Performance - binding: enable mimalloc v3 to reduce idle memory (#9349) by @shulaoda ### 🧪 Testing - mcs: cover require() in `$initial` group (#9376) by @hyf0 - add regression for CJS facade chunk merge into entry (#9351) by @IWANABETHATGUY ### ⚙️ Miscellaneous Tasks - switch prepare-release to manual dispatch with version input (#9383) by @shulaoda - migrate `@rolldown/pluginutils` to `rolldown/plugins` (#9317) by @shulaoda - deps: pin libmimalloc-sys2 to 0.1.54 (#9372) by @shulaoda - replace `igorskyflyer/action-readfile` with `cat` (#9369) by @sapphi-red - deps: update test262 submodule for tests (#9371) by @rolldown-guard[bot] - use app token for test dep update PRs (#9368) by @sapphi-red - replace some actions with gh commands (#9367) by @sapphi-red - replace action-semantic-pull-request with inline regex (#9366) by @sapphi-red - remove pull_request_target workflows (#9188) by @Boshen - deps: upgrade oxc to 0.130.0 (#9360) by @shulaoda - deps: update github actions (major) (#9348) by @renovate[bot] - deps: update github actions (#9341) by @renovate[bot] - deps: update rust crates (#9344) by @renovate[bot] - deps: update crate-ci/typos action to v1.46.1 (#9357) by @renovate[bot] - deps: update npm packages (#9343) by @renovate[bot] - deps: update pnpm to v10.33.4 (#9347) by @renovate[bot] - deps: update dependency rolldown-plugin-dts to ^0.25.0 (#9346) by @renovate[bot] - .claude: add rolldown-repl encoder, rename decode skill (#9352) by @IWANABETHATGUY - deps: update crate-ci/typos action to v1.46.0 (#9345) by @renovate[bot] - deps: update napi to v3.8.6 (#9342) by @renovate[bot] - deps: update dependency vite-plus to v0.1.20 (#9340) by @renovate[bot] - enable rollup chunking-form test (#9335) by @IWANABETHATGUY - typo: fix typo in watcher options comment (#9324) by @thescripted ### ❤️ New Contributors * @Kyujenius made their first contribution in [#9262](#9262) * @SAY-5 made their first contribution in [#9296](#9296) * @thescripted made their first contribution in [#9324](#9324) Co-authored-by: shulaoda <[email protected]>

github-actions Bot assigned h-a-n-a Apr 16, 2026

h-a-n-a mentioned this pull request Apr 17, 2026

fix: collect destructured bindings in HMR module exports #9146

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fix(dev/lazy): avoid module reinitialization in lazy compilation patches #9179

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fix(dev): visit identifier references for runtime rewrites in HMR finalizer #9191

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fix(dev/lazy): lazily compiled modules should be watched #9301

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wip: disable node_modules watch #9303

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release: v1.0.1 #9384

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fix(rolldown_plugin_lazy_compilation): use loadExports for fetched proxy to preserve original export names#9132

fix(rolldown_plugin_lazy_compilation): use loadExports for fetched proxy to preserve original export names#9132
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