@empathyco/x-components/docs/API-reference/api/x-components.stateselector.md

Empathy X Components

<!-- Do not edit this file. It is automatically generated by API Documenter. -->

[Home](./index.md) &gt; [@empathyco/x-components](./x-components.md) &gt; [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<ReturnType, State extends Dictionary, Getters extends Dictionary> extends WatchOptions 
```
**Extends:** WatchOptions

## Properties

<table><thead><tr><th>

Property


</th><th>

Modifiers


</th><th>

Type


</th><th>

Description


</th></tr></thead>
<tbody><tr><td>

[filter?](./x-components.stateselector.filter.md)


</td><td>


</td><td>

(newValue: ReturnType, oldValue: ReturnType, state: State) =&gt; boolean


</td><td>

_(Optional)_ Asserts if the event should really be emitted taking into account the new and old values and the module state.


</td></tr>
<tr><td>

[metadata?](./x-components.stateselector.metadata.md)


</td><td>


</td><td>

Partial&lt;[WireMetadata](./x-components.wiremetadata.md)<!-- -->&gt;


</td><td>

_(Optional)_


</td></tr>
<tr><td>

[selector](./x-components.stateselector.selector.md)


</td><td>


</td><td>

[SimpleStateSelector](./x-components.simplestateselector.md)<!-- -->&lt;ReturnType, State, Getters&gt;


</td><td>


</td></tr>
</tbody></table>