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Ensure App Router and Pages Router modules can't share chunks #50327

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merged 5 commits into from
May 25, 2023
Merged

Ensure App Router and Pages Router modules can't share chunks #50327

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bb2e61e
Ensure App Router and Pages Router modules can't share chunks
timneutkens May 25, 2023
cf1e3e4
Update webpack-config.ts
timneutkens May 25, 2023
82f3d00
Merge branch 'canary' into 05-25-Ensure_App_Router_and_Pages_Router_m…
huozhi May 25, 2023
e8f243c
Merge branch 'canary' into 05-25-Ensure_App_Router_and_Pages_Router_m…
huozhi May 25, 2023
9576359
Merge branch 'canary' into 05-25-Ensure_App_Router_and_Pages_Router_m…
huozhi May 25, 2023
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12 changes: 12 additions & 0 deletions packages/next/src/build/webpack-config.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -1672,6 +1672,10 @@ export default async function getBaseWebpackConfig(
framework: {
chunks: 'all',
name: 'framework',
// Ensures the framework chunk is not created for App Router.
layer(layer: any) {
return layer === null || layer === undefined
},
test(module: any) {
const resource = module.nameForCondition?.()
return resource
Expand All @@ -1696,6 +1700,7 @@ export default async function getBaseWebpackConfig(
)
},
name(module: {
layer: string | null | undefined
type: string
libIdent?: Function
updateHash: (hash: crypto.Hash) => void
Expand All @@ -1712,6 +1717,13 @@ export default async function getBaseWebpackConfig(
hash.update(module.libIdent({ context: dir }))
}

// Ensures the name of the chunk is not the same between two modules in different layers
// E.g. if you import 'button-library' in App Router and Pages Router we don't want these to be bundled in the same chunk
// as they're never used on the same page.
if (module.layer) {
hash.update(module.layer)
}

return hash.digest('hex').substring(0, 8)
},
priority: 30,
Expand Down