TanStack Form is a cross-framework form state management library that provides typed fields, validation, and submission across React, Vue, Angular, Solid, Lit, Svelte, and Preact. It uses a shared form model that adapts to different UI frameworks while preserving the same validation and submission logic, and offers headless form controls that impose no UI markup, letting developers bring their own inputs and design system.
The library distinguishes itself through granular state subscription, where components subscribe to narrow slices of form or field state using reactive primitives, so only the relevant UI re-renders on each change instead of the entire component tree. It supports typed form validation with full TypeScript inference, running synchronous validators on field changes and debounced asynchronous checks for slow business rules, keeping field names, values, and errors connected through refactors.
The project covers form field definition with type-safe APIs, submission of typed form data with inferred value shapes, and validation with both sync and async rules. It provides framework-specific adapters while keeping the same typed form model and validation strategy, and supports subscribing to granular form or field state to prevent unnecessary re-renders on large forms.