Attempting to adhere to the prescribed Cypress tutorial is resulting in various errors related to being "compiled under '--isolatedModules'"

Question

Attempting to adhere to the prescribed Cypress tutorial is resulting in various errors related to being "compiled under '--isolatedModules'"

I am new to using Cypress and I have been following the helpful tutorial on testing your first application. However, I have encountered some compiler issues in the third section.

Following the instructions, I created a custom command but I am receiving the following compiler error:

https://i.sstatic.net/Cn4qc.png

After reading this Stack Overflow post, it seems like adding export {} to my file may resolve the issue.

However, when I add that line to the commands.ts file, the error disappears from there but appears in another file. Adding the same line to that file just moves the error to a new location. This cycle continues until I end up with this error:

https://i.sstatic.net/h55uu.png

If anyone could offer beginner-friendly guidance on how to troubleshoot this issue, I would greatly appreciate it. I was making good progress until I reached this point 😥

typescript cypress

Answer 1

Answer №1

If you're looking to quickly resolve the issue, adding `export {}` to the file may work temporarily, but it's not an ideal solution - using a phony export to indicate file type is not standard practice.

The root of the problem likely lies in your tsconfig configuration. Check out the official Typescript documentation on tsconfig.json for more insights (Cypress documentation lacks detailed information on typescript).

You can also compare your setup with the cypress-realworld-app repository for a functioning example.

In the previous file, consider swapping the order of the export statement and typings comment if they are causing issues.

/// <reference types="cypress" />
export {}

For further clarification, refer to the second answer on How does importing fix the --isolatedModules error?. It might be beneficial to have a dedicated tsconfig specifically at the /cypress directory level just for testing purposes, following a similar approach used in the realworld app.

Answer 2

If you're looking to quickly resolve the issue, adding `export {}` to the file may work temporarily, but it's not an ideal solution - using a phony export to indicate file type is not standard practice.

The root of the problem likely lies in your tsconfig configuration. Check out the official Typescript documentation on tsconfig.json for more insights (Cypress documentation lacks detailed information on typescript).

You can also compare your setup with the cypress-realworld-app repository for a functioning example.

In the previous file, consider swapping the order of the export statement and typings comment if they are causing issues.

/// <reference types="cypress" />
export {}

For further clarification, refer to the second answer on How does importing fix the --isolatedModules error?. It might be beneficial to have a dedicated tsconfig specifically at the /cypress directory level just for testing purposes, following a similar approach used in the realworld app.

Answer 3

Answer №2

Make a change to your cypress/index.ts file by renaming it to cypress/cypress.d.ts. You do not have to include reference or export there.

Here is an example of what my cypress.d.ts file looks like:

declare global {
  namespace Cypress {
    interface Chainable {
      getByTestId(value: string): Chainable<JQuery<HTMLElement>>;
    }
  }
}

I highly suggest following the official tutorial on creating a separate tsconfig in the cypress folder. It's crucial to avoid any references to cypress in your main tsconfig.

Answer 4

Make a change to your cypress/index.ts file by renaming it to cypress/cypress.d.ts. You do not have to include reference or export there.

Here is an example of what my cypress.d.ts file looks like:

declare global {
  namespace Cypress {
    interface Chainable {
      getByTestId(value: string): Chainable<JQuery<HTMLElement>>;
    }
  }
}

I highly suggest following the official tutorial on creating a separate tsconfig in the cypress folder. It's crucial to avoid any references to cypress in your main tsconfig.

Attempting to adhere to the prescribed Cypress tutorial is resulting in various errors related to being "compiled under '--isolatedModules'"

Answer №1

Answer №2

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