'spec.cy.ts' cannot be compiled under '--isolatedModules' because it is considered a global script file. Add an import, export, or an empty 'export {}' statement to make it a module.

[bryanltobing]

Current behavior

The error happened when I configured cypress with typescript and ran type check using npx tsc --noEmit --incremental false

Desired behavior

There's no error

Test code to reproduce

I use nextjs.

and based on this example https://github.com/vercel/next.js/tree/canary/examples/with-cypress they solved it by adding export {}
to every cypress.ts file which I think is ugly and can be easily forgotten.
https://github.com/vercel/next.js/blob/cd3e054f14ce38f4ff57c727a997da2a6e1d05dd/examples/with-cypress/cypress/e2e/app.cy.ts#L22-L23

My project can be tested here https://github.com/bryantobing12/next-boilerplate/tree/feat/cypress

• pnpm install
• pnpm type:check

The error will appear

Cypress Version

10.3.1

Other

What I have tried:

• Adding tsconfig.json file as recommended here https://docs.cypress.io/guides/tooling/typescript-support#Configure-tsconfig-json.
• Adding isolatedModules: false to cypress/tsconfig.json. but the error won't disappear.

[ZachJW34]

@bryantobing12 to work around this, you could exclude all of the cypress files from your tsconfig.json, and then run separate npx tsc -p cypress/tsconfig.json --noEmit process to typecheck your Cypress files.

Unfortunately, there is nothing we can do to get rid of this error as cypress tests are not structured in such a way that makes the isolatedModules flag happy.