Error2 reports
Fix GenericTypeError
in Vitest
✅ Solution
GenericTypeError in Vitest often arises from missing or mismatched dependencies, particularly Chai matchers. Ensure all necessary dependencies, including `@testing-library/jest-dom` or similar Chai plugins, are correctly installed and configured in your `vitest.config.ts` file, using `setupFiles` to import the required matchers. Verify that package versions are compatible and that any custom matchers are correctly defined and registered.
Related Issues
Real GitHub issues where developers encountered this error:
Timeline
First reported:Dec 5, 2025
Last reported:Dec 11, 2025