Angular Angular Forms Angular Signals

I Added Cross-Field Validation with Signal Forms. This Is How I Did It

November 27, 2025

With Angular’s new Signal Forms API, cross-field validation no longer needs to be complex or scattered across your app. In this post, we’ll build a real-world password and confirm password validator using the validate() function to compare values across fields the modern way. You’ll learn how to access other field values with valueOf, return custom validation errors, and keep your validation logic clean, declarative, and colocated with your form definition.