Form

@logixjs/form is the “form domain package” in the Logix ecosystem. It hosts a form’s values / errors / UI / submit state as a regular module inside the Runtime, so your form and the rest of your application share the same:

• Runtime lifecycle and transaction semantics (at most one observable commit per interaction)
• Debugging and replay (DevTools timeline, error tree, state snapshots)
• Declarative derivation / validation / async resources (Trait / Resource / Effect)

Recommended order (from basics to advanced)

1. Overview: the Form model
2. Quick Start
3. Rules DSL（z）
4. Validation & errors
5. Field arrays
6. Migration guide (traits → rules)
7. Derived and linked fields (derived / Trait)
8. Schema validation & error mapping
9. Performance & optimization

What you’ll get

• Understand why Form.make(...) returns a Blueprint, and how to wire it into the Runtime like any other module
• Learn why the error tree uses the $list/rows[] convention, and how to keep errors and UI state stable when rows are added/removed/reordered
• Use validateOn / reValidateOn to design validation strategies for “before submit / after submit”, and trigger precise validation via a controller outside React components
• In large forms/lists, reduce render and validation cost with selector subscriptions and stable identity