Netlify-cli error "Cannot find module 'exports'"

Problem with netlify-cli. I created a extremely simple reproduction repository.

I’m using the new @netlify/functions first-class typescript support feature. Love it (except for this problem), by the way, thanks!

The problem is, I’m importing a dependency, the official AWS S3 client @aws-sdk/client-s3, and this is causing netlify dev to break. Here’s the relevant code from the repro:

import { Handler } from '@netlify/functions';
import { S3 } from '@aws-sdk/client-s3';

const handler: Handler = async (event) => {
  // Omitted: actually doing something with the S3 Client
  // vvvv--- but this line causes `netlify dev` to break
  const client = new S3({});

  return {
    statusCode: 200,
    body: `Hello world`,

export { handler };

The error message reported by netlify-cli is “Cannot find module 'exports'” (full error message below).

NOTE: the function builds just fine on netlify and works, it’s just netlify-cli chokes on it.

If I comment out the usage of the S3 imported function, the problem goes away (I presume because of esbuild tree-shaking or something).

I also made the recommended settings of esModuleInterop and isolatedModules in the tsconfig.json file.

Again, there’s a super simple reproduction here:

Just clone, npm install, and run npm run dev to see the issue. Thanks in advance for any help, and again, really love the first-class typescript support! :pray:

◈ Function builder zip-it-and-ship-it building functions from directory /netlify-cli-bug-repo/netlify/functions
◈ Function builder zip-it-and-ship-it finished building functions from directory /netlify-cli-bug-repo/netlify/functions
    Error: In file "/netlify-cli-bug-repo/.netlify/functions-serve/test/test.js"
    Cannot find module 'exports'
    Require stack:
    - /netlify-cli-bug-repo/node_modules/@netlify/zip-it-and-ship-it/src/node_dependencies/resolve.js
    - /netlify-cli-bug-repo/node_modules/@netlify/zip-it-and-ship-it/src/node_dependencies/index.js
    - /netlify-cli-bug-repo/node_modules/@netlify/zip-it-and-ship-it/src/main.js
    - /netlify-cli-bug-repo/node_modules/netlify/src/deploy/hash_fns.js
    - /netlify-cli-bug-repo/node_modules/netlify/src/deploy/index.js
    - /netlify-cli-bug-repo/node_modules/netlify/src/index.js
    - /netlify-cli-bug-repo/node_modules/@netlify/config/src/api/client.js
    - /netlify-cli-bug-repo/node_modules/@netlify/config/src/main.js
    - /netlify-cli-bug-repo/node_modules/netlify-cli/src/utils/command.js
    - /netlify-cli-bug-repo/node_modules/netlify-cli/src/commands/dev/index.js
    - /netlify-cli-bug-repo/node_modules/@oclif/config/lib/plugin.js
    - /netlify-cli-bug-repo/node_modules/@oclif/config/lib/config.js
    - /netlify-cli-bug-repo/node_modules/@oclif/config/lib/index.js
    - /netlify-cli-bug-repo/node_modules/@oclif/command/lib/command.js
    - /netlify-cli-bug-repo/node_modules/@oclif/command/lib/index.js
    - /netlify-cli-bug-repo/node_modules/netlify-cli/src/index.js
    - /netlify-cli-bug-repo/node_modules/netlify-cli/bin/run
1 Like

Hey @jaredh159,
Would you mind filing this on the CLI repo? It’ll get :eyes: quicker that way. Also very glad to hear that you’re excited about the Typescript support, I’ll pass that along to the team!

sure, I was wondering when I opened this if that would be a better spot.


1 Like