Evolution in Form Validators: Goodbye customError, Hello Plain Objects

Angular is simplifying custom validation error handling in its Signal-based forms. The key improvement allows direct return of plain JavaScript objects (POJOs) for custom errors. This simplifies the validator API, reducing the need for wrapper functions. Developers no longer require importing and using utility functions. The new approach lets validation functions return an object to signal an error, or null/undefined if valid. This change minimizes boilerplate code, enhancing developer experience. The API's intuitiveness improves as developers readily return error objects. Testing is also easier with this method, through trivial mocking of validators. The approach aligns with how synchronous validators function in Angular. This is a subtle yet significant improvement, promoting API consistency. Ultimately, this change contributes to a cleaner, more intuitive, and developer-friendly Angular experience.