Error in cypress configuration occurs when a plug is mistakenly defined as an import instead of a const within the cypress.config.ts file

Hello, I am new to using Cypress so please bear with me if this seems like a trivial issue. Below you will find my cypress.config.ts file where I am attempting to integrate the cypress esbuild preprocessor into the configuration.

import cypress_esbuild_preprocessor from '@bahmutov/cypress-esbuild-preprocessor';
import { defineConfig } from 'cypress';

export default defineConfig({
  e2e: {
    setupNodeEvents(on) {
      on(
        'file:preprocessor',
        cypress_esbuild_preprocessor(),
      );
    },
  },
});

When I run Cypress, I encounter the following configuration error in the console-

TypeError: (0 , cypress_esbuild_preprocessor_1.default) is not a function

I found that it works fine if I create cypress_esbuild_preprocessor as a const like this-

const cypress_esbuild_preprocessor = require('@bahmutov/cypress-esbuild-preprocessor');

Since I am using TypeScript for coding, I prefer to import the plugin rather than use it as a const. The version of Cypress I am using is 12.17.1. Any thoughts on this would be greatly appreciated. Thank you!

Answer №1

To resolve this issue, I made the necessary adjustment by setting

"esModuleInterop": true
within the compilerOptions section of tsconfig.json.

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