Cannot find module './types/standard' from 'index.js'

[budarin]

Steps to reproduce

Tell us about your environment:

• Puppeteer version: 1.5.0
• Platform / OS version: Windows 7
• URLs (if applicable): repo
• Node.js version: 10.4.0

What steps will reproduce the problem?

Please include code that reproduces the issue.

1. upgrade puppeteer from 1.1.1 to 1.5.0 version
2. run test: ````npm test App1```

What is the expected result?
to run puppeteer

What happens instead?
error:

    Cannot find module './types/standard' from 'index.js'

      at Resolver.resolveModule (../node_modules/jest-resolve/build/index.js:210:17)
      at Object.<anonymous> (../node_modules/puppeteer/node_modules/mime/index.js:4:27)

if I return to 1.1.1 version - puppeteer runs and pass the test

[Prior99]

I am experiencing the exact same error with version 1.5.0 and it works just fine when downgrading to 1.1.1.

[jonjiang1]

Also had the same error and downgrading worked. Is there no other fix though?

[aslushnikov]

I see you've managed to upgrade to 1.5.0 here: budarin/react-http2-bootstrap-project@9892390

The error itself doesn't relate to puppeteer: instead it has something to do with jest module resolution.

[AdirAmsalem]

Cause:
The error happens because puppeteer v1.5 started to use [email protected]: 37cc9f5#diff-b9cfc7f2cdf78a7f4b91a753d10865a2R32).

in [email protected] they added a require to a JSON file: https://github.com/broofa/node-mime/blob/master/index.js#L4

Most "copy-paste" Jest configurations doesn't support loading JSONs as-is, so that's probably the cause.

To solve the problem:
Simply add "json" to the moduleFileExtensions entry in the jest property in your package.json file.

// package.json

"jest": {
  "moduleFileExtensions": [
    "json"
  ]
}

- You probably already have other extensions there, so make sure not to remove them but to add "json" in addition.

[alexesca]

This error is pretty clear. Jests outputs You might want to include a file extension in your import, or update your 'moduleFileExtensions', which is currently ['ts', 'tsx', 'js', 'jsx', 'html']. I added the file extension(in this case json) to my moduleFileExtension field in the jest.config.js of my lib. If you are using a monorepo, every app/lib creates its own jest.config.js.