# ShouldUpdateState hook

In some cases you might need to postpone state update to some time for example until field is valid. In this case you can do use `shouldUpdateState` method

```typescript
 componentDidMount() {
    this.formStateManager = Store.store.select(['form']).form
        .bind(this.form.current)
        .addCustomFormElements([this.customFormElement.current])
        .shouldUpdateState(this.shouldUpdateState)
        .onChange(state => this.forceUpdate())
        .sync();
}
```

```typescript
shouldUpdateState = (params: ShoulUpdateStateParams) => {
    return true;
}
```

#### ShouldUpdateStateParams:

* form: `HTMLFormElement` - form that has being synced
* formElements: `FormElement[]` - all form elements that are being synced
* target: `HTMLElement | CustomFormElement` - current html element or custom form element
* state: `any` - state before update
* currentValue: `any` - current field value
* value: `any` - target value