With Cypress, you can easily create tests for your modern web applications, debug them visually, and automatically run them in your continuous integration builds.

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Shouldn't matter. You could test a php site in Cypress, it's completely agnostic.

So if you're having issues, it's something else

hmm... actually, my demo is node.js based, with some front & back JS (as ES6 modules and that type into my `package.json`)

Yeah what I'm saying is it doesn't matter at all.

It could be in any language, in any stack. For example, you could've already deployed to prod at `https://my-website.com` and Cypress doesn't care how you compiled or deployed the App

but even if I create a `cypress/plugins/index.js` in ESM/CJS style, it complains

Ok that's different... You're trying to use ESM inside of Cypress inside of plugins?

I'm trying to have everything in ESM, yeah

It's difficult to get a similar environment up. If you can get me a project that has the same issue, I can play with it.

ok, lemme a few time to eat then I push it into my repo

You're using file:preprocessor aren't you

<@!212548363529355264> done: https://github.com/Lcfvs/anticore

the problem occurs when I add this pluginsFile (which doesn't make anything, actually) ```js
export default (on, config) => {
  return config
}
```

(please don't compare it to a jQuery, it's a very frequent error, it totally works differently)

(the cypress things are into the `/demo`)

<@!212548363529355264> if you have a fix, you can PR it, they are always welcome on my projects 🙂

Yeah you'll need to compile it is the TLDR