Cloudflare Developers•7mo ago

Cannot file module '@cloudflare:workers'

Just created a new worker with wrangler and tried to import { WorkerEntrypoint } from '@cloudflare:workers' as shown on the docs site here: https://developers.cloudflare.com/workers/runtime-apis/bindings/service-bindings/#example--build-your-first-service-binding-using-rpc But I get an error from TypeScript that it can't find the module: Cannot find module '@cloudflare:workers' or its corresponding type declarations. typescript (2307) [2, 34] And I also get an error from wrangler when I try to deploy it:

Uncaught Error: Dynamic require of "cloudflare:workers" is not supported
    at null.<anonymous> (worker.js:14:11)
    at null.<anonymous>

Uncaught Error: Dynamic require of "cloudflare:workers" is not supported
    at null.<anonymous> (worker.js:14:11)
    at null.<anonymous>

Has anyone run into this issue before? I would appreciate the help, thanks!

Cloudflare Docs

Service bindings - Runtime APIs · Cloudflare Workers docs

Facilitate Worker-to-Worker communication.

18 Replies

Hello, I’m Allie!•7mo ago

What does your Worker look like?

s9tpepperOP•7mo ago

this is the main function:

export class DrCheck extends WorkerEntrypoint {
  async check(request: Request, env: Env, ctx: ExecutionContext): Promise<Response> {
    const response = await fetch(request)

    if (response.status === 200) {
      return handle200(request, response, env, ctx)
    }

    if (response.status > 499) {
      return await handle500(request, env)
    }

    return new Response(response.body, response)
  }
}

export class DrCheck extends WorkerEntrypoint {
  async check(request: Request, env: Env, ctx: ExecutionContext): Promise<Response> {
    const response = await fetch(request)

    if (response.status === 200) {
      return handle200(request, response, env, ctx)
    }

    if (response.status > 499) {
      return await handle500(request, env)
    }

    return new Response(response.body, response)
  }
}

alien•7mo ago

the doc seems to say "cloudflare:workers" not "@cloudflare:workers" on the import, could that be causing it?

s9tpepperOP•7mo ago

:NotLikeThis:

Hello, I’m Allie!•7mo ago

^That, and if that doesn't work, try adding an export default {}; at the bottom

s9tpepperOP•7mo ago

good catch, sorry about that lol - damn, caught by one character

alien•7mo ago

:lulujoy:

s9tpepperOP•7mo ago

hrm, nevermind - LSP removed the error and then brought it back :/ the error did change though now its just Unable to resolve path to module 'cloudflare:workers' and wrangler still gives the same error when I try to deploy

Hello, I’m Allie!•7mo ago

Try adding export default {}; at the bottom

s9tpepperOP•7mo ago

so wrangler lets me deploy if I add this:

export default {
  fetch() {
    // eslint-disable-next-line
    console.log('unimplemented')
  },
}

export default {
  fetch() {
    // eslint-disable-next-line
    console.log('unimplemented')
  },
}

The error about being unable to resolve cloudflare:workers is still there though - not sure why

alien•7mo ago

did u npm i?

s9tpepperOP•7mo ago

yea I dont think the solution is usable though, the test interface throws an error trying to use that worker now as a binding Could not serialize object of type \"Fetcher\". This type does not support serialization. - I think I'm going to have to retreat on trying to use the worker as RPC

kian•7mo ago

I wouldn’t expect that you’re able to pass stuff like env or ctx Even requests I guess, since they have request.fetcher

s9tpepperOP•7mo ago

maybe that's where the serialization errors are coming from, I'll refactor those objects out and retry

MBrimmer•5mo ago

@s9tpepper Were you able to resolve "The error about being unable to resolve cloudflare:workers is still there though - not sure why"? If so how?

yarn add cloudflare:workers
➤ YN0027: cloudflare:workers@unknown can't be resolved to a satisfying range
➤ YN0035: Package not found
➤ YN0035:   Response Code: 404 (Not Found)
➤ YN0035:   Request Method: GET
➤ YN0035:   Request URL: https://registry.yarnpkg.com/cloudflare:workers

➤ Errors happened when preparing the environment required to run this command.

yarn add cloudflare:workers
➤ YN0027: cloudflare:workers@unknown can't be resolved to a satisfying range
➤ YN0035: Package not found
➤ YN0035:   Response Code: 404 (Not Found)
➤ YN0035:   Request Method: GET
➤ YN0035:   Request URL: https://registry.yarnpkg.com/cloudflare:workers

➤ Errors happened when preparing the environment required to run this command.

I think I solved it by upgrading "@Cloudflare/workers-types" to the latest version.

Chinoman10•5mo ago

My @cloudflare/workers-types are at the latest version, but I can't seem to be able to import { DurableObject } from "cloudflare:workers"; :shrugg:

Brod•3mo ago

did you resolve this @Chinoman10? I might have this same issue:

Hello, I’m Allie!•3mo ago

Please do not reopen old threads. If you are having issues, please open a new thread instead

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Cannot file module '@cloudflare:workers'