fix(js): recognize tsconfig module `nodenext` as ESM

[JoshuaCWebDeveloper]

Current Behavior

A tsconfig module value of nodenext is treated as a CJS format, which produces a warning when built due to it being used in ESM projects.

Expected Behavior

A tsconfig module value of nodenext is now teated as an ESM format, producing no warning when built.

Related Issue(s)

Fixes https://github.com/nrwl/nx/issues/31295

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Project	Deployment	Preview	Updated (UTC)
nx-dev	Ready	Preview	Aug 29, 2025 3:44am

[nx-cloud[bot]]

🤖 Nx Cloud AI has analyzed the error but could not create a fix

No fix generated, but analysis is available • View Fix ↗

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View your CI Pipeline Execution ↗ for commit 3b643599bbed132d0ae14daef81bc516d85d79a6

Command	Status	Duration	Result
nx affected --targets=lint,test,build,e2e,e2e-c...	❌ Failed	40m 18s	View ↗
nx run-many -t check-imports check-commit check...	✅ Succeeded	1m 56s	View ↗
nx-cloud record -- nx-cloud conformance:check	✅ Succeeded	2s	View ↗
nx-cloud record -- nx format:check	✅ Succeeded	6s	View ↗
nx-cloud record -- nx sync:check	✅ Succeeded	5s	View ↗
nx documentation	✅ Succeeded	3m	View ↗

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☁️ Nx Cloud last updated this comment at 2025-08-14 03:07:42 UTC

[JoshuaCWebDeveloper]

Failed check is due to failing test in angular:test on master, unclear whether or not the fix is to just update the snapshot.

[Coly010]

Hey @JoshuaCWebDeveloper I'm not sure if this is 100% correct.

NodeNext will be ESM if the nearest package.json type is module, and/or depending on the file extension of files.

[JoshuaCWebDeveloper]

Hey @JoshuaCWebDeveloper I'm not sure if this is 100% correct.

NodeNext will be ESM if the nearest package.json type is module, and/or depending on the file extension of files.

@Coly010 Good point. Looked at this a bit closer, format is an optional option to updatePackageJson() because it is already checking the package.json type. getUpdatedPackageJsonContent() also has logic for handling no given format.

My new solution passes a format of undefined to updatePackageJson() for the node* module types. This allows updatePackageJson() to determine the correct format (currently checks package.json, and can check file extensions in the future if it needs to). I also check every single tsconfig module option for completeness and to make it super clear what the method returns now that I'm introducing a third return type.

[Coly010]

Should be handled now by: https://github.com/nrwl/nx/pull/31508

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