> For the complete documentation index, see [llms.txt](https://atomico.gitbook.io/doc/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://atomico.gitbook.io/doc/api/hooks/usestate.md).

# useState

## Syntax

```javascript
const [state, setState] = useState(optionalInitialState);
```

Where:

1. `const [state,setState]` : Return of `useState`, the arguments allow reading and updating of the state associated with the hook instance.
   * `state` : Current state.
   * `setState`: Current status updater.
2. `useState( optionalInitialState )`: Function that associates the state to the webcomponent:
   * `optionalInitialState`: Optional parameter that defines the initial state associated to the hook instance, **If `optionalInitialState` is a function it will be executed in order to obtain the initial state only at the moment of the hook instance for the first time**.

### Example

```jsx
function MyComponent() {
  const [count, setCount] = useState(0);
  return <host onclick={() => setCount(count + 1)}> {count} </host>;
}
```


---

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