Error: Unknown option: .mode. Check out ...

[ivanvorona]

Hi folks, i am trying to run cypress on my vuejs project. any *spec.js open attempts give me this error message:

Error: Webpack Compilation Error
./cypress/integration/examples/sample_spec.js
Module build failed (from C:/Users/ivan_/AppData/Local/Cypress/Cache/6.5.0/Cypress/resources/app/packages/server/node_modules/babel-loader/lib/index.js):
Error: Unknown option: .mode. Check out https://babeljs.io/docs/en/babel-core/#options for more information about options.

Desired behavior

No error.

Test code to reproduce

https://dev.azure.com/olympianguru/OLYMPIAN_GURU/_git/OG_MARKETPLACE

Versions

Never worked for this project. first time tried.

[mccataldo]

@ivanvorona I found a similar issue with a comment including a possible solution.
#6755 (comment)
Give it a try and post an update here.

[mccataldo]

@ivanvorona you could also try removing the .babelrc file or compilation configs in package.json just to see if there's a difference.

[ivanvorona]

Hi @mccataldo - i've removed this file: babel.config.js from my project and it fixed the issue. any idea what dependency & why it broke cypress?
will research if that config will have other impact on my project.

Thanks,
Ivan

[mccataldo]

@ivanvorona Not sure yet. What happens if you put a new babel config in the cypress directory?

[JessicaSachs]

@ivanvorona I think Cypress may have an older version of babel-loader than what's supported in your application's version. In our latest 3.x release (private alpha) we rewrote this so that we do not bundle any user dependencies (babel, webpack, etc) to avoid these kinds of versioning issues.

We'll be releasing 3.x for public use on around March 15th. If you don't want to upgrade, you can pass in a webpack configuration in your plugins file where you remove the babel-loader for Cypress only.

You should probably keep your babel file when building your app for production.

I hope this helps. I'll update this issue when we release 3.x. I'm going to close this issue unless you have anything else to add.