@fluentui-react-native/framework-base

This package provides core implementations and types to support both the legacy and current frameworks.

The functionality in these packages is now exposed as part of this package.

Component Patterns

The shared rendering patterns and JSX handlers are centralized in this package. See the component authoring guide for how to choose and combine directComponent, phasedComponent, and slots.

Type Helpers

This package provides several TypeScript utility types:

• PropsOf<TComponent> - Extract props from a React component type
• PropsWithRefOf<TComponent> - Extract props, including a supported ref, from a React component type
• PropsChildren<TProps> - Extract the children entry from a props type
• PropsWithoutChildren<TProps> / PartialWithoutChildren<TProps> - Remove children while preserving unions
• FunctionComponent<TProps> - A function component type without the children handling complications of React.FC
• DirectComponent<TProps> - A function component marked for direct rendering
• PhasedComponent<TProps> - A component with two-phase rendering support
• PhasedRender<TProps> - The render signature for phased components (phase one returns the phase two renderer)
• SlotComponent<TProps> - Slot component type used in the composition framework
• PropsTransform<TPropsIn, TPropsOut> - A transform that maps one set of props to another
• ComponentPropsTransform<TComponent> - A transform for the resolved props of a component type
• SlotOptions<TComponent> - Default props, transform, and optional-slot rendering behavior
• Simplify<T>, OuterPartial<T>, and PartialExcept<T, K> - Helpers for producing readable partial object types
• MergeCoreOptions - Options accepted by immutableMergeCore
• ValueFactory<T> - Factory signature accepted by memo cache functions

JSX Runtime

This package exports a custom JSX runtime at @fluentui-react-native/framework-base/jsx-runtime. Use it in your component files by adding this pragma as the first line of the file:

/** @jsxImportSource @fluentui-react-native/framework-base */

The custom runtime enables automatic element flattening for direct and phased components. Any package using this pragma must include @fluentui-react-native/framework-base in its devDependencies.

Note: This is the current pattern and replaces the legacy /** @jsx withSlots */ directive (which required importing withSlots explicitly). The exported withSlots helper remains available only for the classic runtime used by deprecated framework code.