[Home](./index.md) > [@empathyco/x-components](./x-components.md) > [StateSelector](./x-components.stateselector.md) ## StateSelector interface Composition type of [SimpleStateSelector](./x-components.simplestateselector.md) which allows to indicate if the state selector should be executed in first instance (first assignment of values). Selector is the [SimpleStateSelector](./x-components.simplestateselector.md) and immediate flags if the selector should be executed when it is initialized for first time. **Signature:** ```typescript export interface StateSelector extends WatchOptions ``` **Extends:** WatchOptions ## Properties

Property	Modifiers	Type	Description
[filter?](./x-components.stateselector.filter.md)		(newValue: ReturnType, oldValue: ReturnType, state: State) => boolean	_(Optional)_ Asserts if the event should really be emitted taking into account the new and old values and the module state.
[metadata?](./x-components.stateselector.metadata.md)		Partial<[WireMetadata](./x-components.wiremetadata.md)>	_(Optional)_
[selector](./x-components.stateselector.selector.md)		[SimpleStateSelector](./x-components.simplestateselector.md)<ReturnType, State, Getters>