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Fix mixed exports in server component with barrel optimization (#64894)
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### What

* Remove the change added in #64467, but still kept tests.
* Add more tests for mixed imports (component and function) from shared
component with `optimizePackageImports`

### Why

The fix in #64467 was not correct, as mixing `export *` with `"use
client"` should error if Next.js detect it properly.
When there's mixed exports, that a shared function will become a client
reference if the target file inherits the client boundary.

The original issue #64467 fixed was actually related to tree-shaking,
which is fixed in #64681.

Closes NEXT-3197
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huozhi committed Apr 23, 2024
1 parent 8d01d49 commit 04cc13c
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Showing 8 changed files with 32 additions and 6 deletions.
2 changes: 0 additions & 2 deletions packages/next/src/build/webpack/loaders/next-barrel-loader.ts
Original file line number Diff line number Diff line change
Expand Up @@ -225,8 +225,6 @@ async function getBarrelMapping(
if (targetMatches) {
// Merge the export list
exportList = exportList.concat(targetMatches.exportList)
// Inherit the client boundary from the target matched file
isClientEntry = isClientEntry || targetMatches.isClientEntry
}
})
)
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Original file line number Diff line number Diff line change
@@ -0,0 +1,9 @@
import { buttonStyle, Button } from 'mixed-lib'

export default function Page() {
return (
<div>
<Button id="component" style={buttonStyle()} />
</div>
)
}
Original file line number Diff line number Diff line change
Expand Up @@ -8,10 +8,14 @@ describe('Skipped in Turbopack', () => {
},
({ next }) => {
it('should build successfully', async () => {
// Ensure that MUI is working
const $ = await next.render$('/')
expect(await $('#client-mod').text()).toContain('client:default')
})

it('should handle mixed imports from barrel optimized lib correctly', async () => {
const $ = await next.render$('/mixed-barrel-imports')
expect(await $('#component').attr('style')).toContain('color:blue')
})
}
)
})
Original file line number Diff line number Diff line change
@@ -1,5 +1,5 @@
module.exports = {
experimental: {
optimizePackageImports: ['my-lib'],
optimizePackageImports: ['my-lib', 'mixed-lib'],
},
}

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