Schema-Driven, Framework-Agnostic Forms: Building a Runtime Engine for React, Vue, Angular & Vanilla JS

In this article, I explain how to build dynamic, schema-driven forms that work across React, Vue, Angular, and Vanilla JS using a registry-driven runtime engine. The forms fully decouple data, UI, and logic, and support conditional logic, dynamic validation, and plugin extensibility—all without hardcoding components. In most form systems, even schema-driven ones, logic is still tightly coupled to structure or UI. The goal of Formitiva is to go further: Fully decouple data, presentation, and behavior The Problem with Traditional Separation Typical systems separate: data (JSON schema) UI (components) But logic often remains: embedded in schema hardcoded in components tied to specific frameworks This creates hidden coupling. The Key Idea: Reference, Don’t Embed Instead of embedding logic: { "field": "email", "validatorHandlerName": "emailValidator" } The schema only references behavior. It does not define: how validation works how UI renders how logic executes The Registry System All impl