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fix: preserve sourcemap mappings for chunks containing user code #4450

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Merged
pi0 merged 4 commits into from
Jul 21, 2026
+3 −2
Merged

fix: preserve sourcemap mappings for chunks containing user code #4450

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d28866a
fix: preserve sourcemap mappings for chunks containing user code
danielroe Jul 19, 2026
f5b051b
chore: lint
danielroe Jul 20, 2026
ce144c1
chore: type assertion
danielroe Jul 21, 2026
cacd6b7
Delete test/unit/sourcemap-min.test.ts
pi0 Jul 21, 2026
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5 changes: 3 additions & 2 deletions src/rollup/plugins/sourcemap-min.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -15,9 +15,10 @@ export function sourcemapMininify() {
}
// Parse sourcemap
const sourcemap: ExistingRawSourceMap = JSON.parse(asset.source);
// Only process sourcemaps with node_module sources
// Only wipe mappings when every source is from node_modules, so that
// chunks mixing user code with hoisted library code keep their mappings
if (
!(sourcemap.sources || []).some((s) => s.includes("node_modules"))
!(sourcemap.sources || []).every((s) => s.includes("node_modules"))
) {
continue;
}
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