vercel-composition-patterns

Replace boolean props with composition by creating explicit variant components like ThreadComposer or EditComposer. Each variant composes shared compound component pieces instead of passing conditional flags to one monolithic component.

Compound components are structured as a parent provider with subcomponents that access shared state via context rather than props. Consumers compose exactly the pieces they need, such as Composer.Frame, Composer.Input, and Composer.Submit.

Prefer children for composing static structure since they are more readable and compose naturally. Use render props only when the parent needs to pass data back to the child, such as rendering list items.

No, React 19 makes ref a regular prop, so forwardRef is unnecessary. The use() hook also replaces useContext() and can be called conditionally, unlike useContext.

Lift state into a provider component that wraps the siblings. Any component inside the provider boundary can access state and actions via context, even if it is not visually nested inside the main UI.