Your First Custom Validator in Angular Signal Forms (Step-By-Step)
November 13, 2025Custom validators are one of those things you'll definitely need when building real-world forms. But if you've been wondering how they work with Angular's new Signal Forms API, you're in the right place. Today we'll migrate a form with custom validation from Reactive Forms to Signal Forms, and I think you'll be pleasantly surprised by how straightforward it is. The syntax changes are minimal, and the result is cleaner, more reactive code.