tslib not found in node server production build

[vincaslt]

Prerequisites

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• I am running the latest version
• I checked the documentation (nx.dev) and found no answer
• I checked to make sure that this issue has not already been filed
• I'm reporting the issue to the correct repository (not related to React, Angular or any dependency)

Expected Behavior

I build a production build of my node app, which is generated from @nrwl/node, calling nx build api --prod. I copy the generated files onto my server (or just another directory) and start it with node main.js.

Current Behavior

The error I get when starting is:

> node main.js
internal/modules/cjs/loader.js:800
    throw err;
    ^

Error: Cannot find module 'tslib'
Require stack:
- C:\Users\vinca\Desktop\main.js
�[90m    at Function.Module._resolveFilename (internal/modules/cjs/loader.js:797:15)�[39m
�[90m    at Function.Module._load (internal/modules/cjs/loader.js:690:27)�[39m
�[90m    at Module.require (internal/modules/cjs/loader.js:852:19)�[39m
�[90m    at require (internal/modules/cjs/helpers.js:74:18)�[39m
    at Object.<anonymous> (C:\Users\vinca\Desktop\main.js:91:18)
    at __webpack_require__ (C:\Users\vinca\Desktop\main.js:20:30)
    at Object.<anonymous> (C:\Users\vinca\Desktop\main.js:1086:17)
    at __webpack_require__ (C:\Users\vinca\Desktop\main.js:20:30)
    at Object.<anonymous> (C:\Users\vinca\Desktop\main.js:1076:18)
    at __webpack_require__ (C:\Users\vinca\Desktop\main.js:20:30) {
  code: �[32m'MODULE_NOT_FOUND'�[39m,
  requireStack: [ �[32m'C:\\Users\\vinca\\Desktop\\main.js'�[39m ]
}

[vincaslt]

I sense this is because api build does not include vendors. Is there a configuration option I'm missing?

[vincaslt]

I added this flag in production build config: "externalDependencies": "none"

[agrinko]

@vincaslt , thank you, it helped! I would never guess it...

[hertzg]

For people who are trying out nx and ended up here from google.

You probably have set "importHelpers": true (default config) in your tsconfig.base.json which will use tslib package when there's a need to emit helpers in generated code.

--importHelpers | boolean | false | Import emit helpers (e.g. __extends, __rest, etc..) from tslib

There are reasons when such behavior is Preferred but if you want to opt out of it you could set that flag to false.

References

• https://www.typescriptlang.org/docs/handbook/compiler-options.html
• https://www.npmjs.com/package/tslib

[vanduc1102]

Should we add the tslib to generated packageJson by default ?
When I add "importHelpers": false the build hangs up.

Maybe this could be temporary solutions:

1 -

COPY --from=builder /workdir/dist/apps/${SERVICE_NAME} /workdir
COPY --from=builder /workdir/yarn.lock /workdir/yarn.lock

RUN yarn install --production
RUN yarn add tslib@2.0.0

CMD ["node", "main.js"]

2 -
Adding import 'tslib'; into main.ts also help.

[y-chen]

I have the same error but when I set "importHelpers": false I get the same errors with different modules, like typeorm.

I can't really install missing packages after the build because the production server doesn't have internet access.

Is there a way to build in all the necessary dependencies?

[Kalanamith]

This issue still exists

[ankuragrwl]

I did the following and it worked for me:

In the nestjs App's project.json file, configure generatePackageJson : true inside the build configuration section.

Then add RUN npm --prefix api-gateway --omit=dev -f install to the Dockerfile

[github-actions]

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