Cannot find module @swc/helpers (...)

[brunos3d]

Hello, folks. We recently merged the Unify PR in which introduces some important updates to our project, we still fixing some reports, you may already saw the following error with @swc/helpers when using @module-federation/node or @module-federation/nextjs-mf:

Error: Cannot find module '@swc/helpers/_/_interop_require_default'
[2] Require stack:
[2] - /nextjs-v12/node_modules/@module-federation/enhanced/src/index.js
[2] - /nextjs-v12/node_modules/@module-federation/nextjs-mf/src/plugins/NextFederationPlugin/next-fragments.js
[2] - /nextjs-v12/node_modules/@module-federation/nextjs-mf/src/plugins/NextFederationPlugin/index.js
[2] - /nextjs-v12/node_modules/@module-federation/nextjs-mf/src/index.js
[2] - /nextjs-v12/shop/next.config.js
[2]     at Module._resolveFilename (node:internal/modules/cjs/loader:1077:15)
[2]     at mod._resolveFilename (/nextjs-v12/node_modules/next/dist/build/webpack/require-hook.js:27:32)
[2]     at mod._resolveFilename (/nextjs-v12/node_modules/next/dist/build/webpack/require-hook.js:27:32)
[2]     at Module._load (node:internal/modules/cjs/loader:922:27)
[2]     at Module.require (node:internal/modules/cjs/loader:1143:19)
[2]     at require (node:internal/modules/cjs/helpers:119:18)
[2]     at Object.<anonymous> (/nextjs-v12/node_modules/@module-federation/enhanced/src/index.js:34:34)
[2]     at Module._compile (node:internal/modules/cjs/loader:1256:14)
[2]     at Module._extensions..js (node:internal/modules/cjs/loader:1310:10)
[2]     at Module.load (node:internal/modules/cjs/loader:1119:32) {
[2]   code: 'MODULE_NOT_FOUND',
[2]   requireStack: [
[2]     '/nextjs-v12/node_modules/@module-federation/enhanced/src/index.js',
[2]     '/nextjs-v12/node_modules/@module-federation/nextjs-mf/src/plugins/NextFederationPlugin/next-fragments.js',
[2]     '/nextjs-v12/node_modules/@module-federation/nextjs-mf/src/plugins/NextFederationPlugin/index.js',
[2]     '/nextjs-v12/node_modules/@module-federation/nextjs-mf/src/index.js',
[2]     '/nextjs-v12/shop/next.config.js'
[2]   ]
[2] }

This is a known issue and we are working on it, you can track the progress here.

How to fix it

To fix the error, you need to install the @swc/helpers package manually, you can do it by running the following command:

npm install @swc/helpers

Tasks

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[ScriptedAlchemy]

this looks related to module interop needed for TS to properly import anything that uses module.exports

[RussellCanfield]

I believe you can set a config in swc to embed helpers, this prevents needing to install it as a dependency. Called “external helpers”

[ScriptedAlchemy]

Ive set external helpers to false as this will cause issues with anything entering the webpack runtime (like delegate module or something)