Building elysia v1.2.2 via next build crashes with "Can't resolve 'fs'"

[EvHaus]

What version of Elysia is running?

1.2.2

What platform is your computer?

Darwin 24.1.0 arm64 arm

What steps can reproduce the bug?

In a Next.js project add a file that uses Typebox from Elysia:

import { t } from 'elysia';

export const sampleSchema = t.Object({})

Then build the project with next build.

What is the expected behavior?

The build should succeed.

What do you see instead?

The build fails with:

Failed to compile.

../../node_modules/.pnpm/elysia@1.2.2_@sinclair+typebox@0.34.13_typescript@5.7.2/node_modules/elysia/dist/universal/fs.mjs:2:1
Module not found: Can't resolve 'fs'
Did you mean './fs'?
Requests that should resolve in the current directory need to start with './'.
Requests that start with a name are treated as module requests and resolve within module directories (node_modules, /myproject/node_modules/.pnpm/next@15.1.2_@babel+core@7.26.0_@opentelemetry+api@1.9.0_react-dom@18.3.1_react@18.3.1__react@18.3.1/node_modules/next/dist/bin/node_modules, /myproject/node_modules/.pnpm/next@15.1.2_@babel+core@7.26.0_@opentelemetry+api@1.9.0_react-dom@18.3.1_react@18.3.1__react@18.3.1/node_modules/next/dist/node_modules, /myproject/node_modules/.pnpm/next@15.1.2_@babel+core@7.26.0_@opentelemetry+api@1.9.0_react-dom@18.3.1_react@18.3.1__react@18.3.1/node_modules/next/node_modules, /myproject/node_modules/.pnpm/next@15.1.2_@babel+core@7.26.0_@opentelemetry+api@1.9.0_react-dom@18.3.1_react@18.3.1__react@18.3.1/node_modules, /myproject/node_modules/.pnpm/node_modules, /myproject/packages/forge-web).
If changing the source code is not an option there is also a resolve options called 'preferRelative' which tries to resolve these kind of requests in the current directory too.
  1 | import{ env }from"./env.mjs";
> 2 | const fs = typeof process !== "undefined" && env.NODE_ENV ? await import("fs") : {};
    | ^
  3 | const noop = () => {
  4 | };
  5 | const createReadStream = fs.createReadStream ?? noop;

https://nextjs.org/docs/messages/module-not-found

Import trace for requested module:
../../node_modules/.pnpm/elysia@1.2.2_@sinclair+typebox@0.34.13_typescript@5.7.2/node_modules/elysia/dist/universal/file.mjs
../../node_modules/.pnpm/elysia@1.2.2_@sinclair+typebox@0.34.13_typescript@5.7.2/node_modules/elysia/dist/index.mjs
../rs-api/models/organization.ts
./pages/onboarding/index.tsx


> Build failed because of webpack errors
 ELIFECYCLE  Command failed with exit code 1.

 

Additional information

Rolling back to 1.1.27 fixes the problem.

Have you try removing the node_modules and bun.lockb and try again yet?

Yes

[0-don]

having the same issue using as nextjs adapter only with nodejs

[SaltyAom]

Should have been fixed in e83daaf, published under 1.2.3

Let me know if the issue still persists after updating to 1.2.3.

If so, please provide a simple reproducible repo, thanks.

[0-don]

@SaltyAom

its still happening

[zero@arch next-elysia-prisma]$ bun run build
$ next build
   ▲ Next.js 15.1.2
   - Environments: .env

   Creating an optimized production build ...
Failed to compile.

./node_modules/elysia/dist/universal/file.mjs
Module not found: Can't resolve 'fs'

https://nextjs.org/docs/messages/module-not-found

Import trace for requested module:
./node_modules/elysia/dist/index.mjs
./src/lib/typebox/auth.ts
./src/app/(auth)/login/page.tsx

./node_modules/elysia/dist/universal/file.mjs
Module not found: Can't resolve 'fs/promises'

https://nextjs.org/docs/messages/module-not-found

Import trace for requested module:
./node_modules/elysia/dist/index.mjs
./src/lib/typebox/auth.ts
./src/app/(auth)/login/page.tsx


> Build failed because of webpack errors
error: script "build" exited with code 1
[zero@arch next-elysia-prisma]$ 

[0-don]

here is an example project https://github.com/0-don/next-elysia-prisma

[EvHaus]

Still an issue in 1.2.10. Seeing this:

  ⨯ ./node_modules/.pnpm/elysia@1.2.10_@sinclair+typebox@0.34.13_typescript@5.7.2/node_modules/elysia/dist/universal/file.mjs:96:24
 Module not found: Can't resolve 'fs'
   94 |       } else {
   95 |         if (!createReadStream || !stat) {
 > 96 |           this.value = import("fs").then((fs) => {
      |                        ^^^^^^^^^^^^
   97 |             createReadStream = fs.createReadStream;
   98 |             return fs.createReadStream(path);
   99 |           });
 https://nextjs.org/docs/messages/module-not-found
  ⨯ ./node_modules/.pnpm/elysia@1.2.10_@sinclair+typebox@0.34.13_typescript@5.7.2/node_modules/elysia/dist/universal/file.mjs:100:24
 Module not found: Can't resolve 'fs/promises'
    98 |             return fs.createReadStream(path);
    99 |           });
 > 100 |           this.stats = import("fs/promises").then((fs) => {
       |                        ^^^^^^^^^^^^^^^^^^^^^
   101 |             stat = fs.stat;
   102 |             return fs.stat(path);
   103 |           });

I had to switch from using import {t} from 'elysia' to import {Type} from '@sinclair/typebox' instead.

[luishdz1010]

This also happens while running a simple project with wrangler dev,

  ✘ [ERROR] Could not resolve "fs/promises"
  
  
  ../../node_modules/.pnpm/elysia@1.2.10_@sinclair+typebox@0.34.14_openapi-types@12.1.3_typescript@5.7.3/node_modules/elysia/dist/universal/file.mjs:100:30:
        100 │           this.stats = import("fs/promises").then((fs) => {
            ╵                               ~~~~~~~~~~~~~

[SaltyAom]

Not sure if this would fix the problem since I couldn't replicate it on my end, but with b1bf2f2 which should be published under 1.2.13 might fixed the problem

[EvHaus]

Unfortunately not fixed in 1.2.13:

../../node_modules/.pnpm/elysia@1.2.13_@sinclair+typebox@0.34.25_typescript@5.7.3/node_modules/elysia/dist/universal/file.mjs:96:1
Module not found: Can't resolve 'fs'
  94 |       } else {
  95 |         if (!createReadStream || !stat) {
> 96 |           this.value = import("fs").then((fs) => {
     | ^
  97 |             createReadStream = fs.createReadStream;
  98 |             return fs.createReadStream(path);
  99 |           });

However, I'm going to mark this as resolved. If you need Typebox in a Next.js build, you can switch to direct typebox imports instead:

// Change this
import {t} from 'elysia';

// to
import {Type} from '@sinclair/typebox'

[kravetsone]

Unfortunately not fixed in 1.2.13:

../../node_modules/.pnpm/elysia@1.2.13_@sinclair+typebox@0.34.25_typescript@5.7.3/node_modules/elysia/dist/universal/file.mjs:96:1
Module not found: Can't resolve 'fs'
  94 |       } else {
  95 |         if (!createReadStream || !stat) {
> 96 |           this.value = import("fs").then((fs) => {
     | ^
  97 |             createReadStream = fs.createReadStream;
  98 |             return fs.createReadStream(path);
  99 |           });

However, I'm going to mark this as resolved. If you need Typebox in a Next.js build, you can switch to direct typebox imports instead:

// Change this
import {t} from 'elysia';

// to
import {Type} from '@sinclair/typebox'

or import { t } from "elysia/type-system";

[SaltyAom]

I forgot to warp another import('fs') in 1.2.13, can you check if it works on 1.2.14? thanks

[kravetsone]

I forgot to warp another import('fs') in 1.2.13, can you check if it works on 1.2.14? thanks

Maybe we can add test with Bun.build target web?

[EvHaus]

I forgot to warp another import('fs') in 1.2.13, can you check if it works on 1.2.14? thanks

The build script completed this time! But with warnings:

⚠ Compiled with warnings

../../node_modules/.pnpm/elysia@1.2.14_@sinclair+typebox@0.34.25_typescript@5.7.3/node_modules/elysia/dist/universal/file.mjs
Module not found: Can't resolve 'fs' in '/Users/me/proj/node_modules/.pnpm/elysia@1.2.14_@sinclair+typebox@0.34.25_typescript@5.7.3/node_modules/elysia/dist/universal'

Import trace for requested module:
../../node_modules/.pnpm/elysia@1.2.14_@sinclair+typebox@0.34.25_typescript@5.7.3/node_modules/elysia/dist/universal/file.mjs
../../node_modules/.pnpm/elysia@1.2.14_@sinclair+typebox@0.34.25_typescript@5.7.3/node_modules/elysia/dist/index.mjs
./components/AppLayout/AppLayout.tsx

../../node_modules/.pnpm/elysia@1.2.14_@sinclair+typebox@0.34.25_typescript@5.7.3/node_modules/elysia/dist/universal/file.mjs
Module not found: Can't resolve 'fs/promises' in '/Users/me/proj/node_modules/.pnpm/elysia@1.2.14_@sinclair+typebox@0.34.25_typescript@5.7.3/node_modules/elysia/dist/universal'

Import trace for requested module:
../../node_modules/.pnpm/elysia@1.2.14_@sinclair+typebox@0.34.25_typescript@5.7.3/node_modules/elysia/dist/universal/file.mjs
../../node_modules/.pnpm/elysia@1.2.14_@sinclair+typebox@0.34.25_typescript@5.7.3/node_modules/elysia/dist/index.mjs
./components/AppLayout/AppLayout.tsx