Notes/docs/Developer Guide/Developer Guide/Old documentation/Development and architecture/Options/Refresh widget with option cha.md

# Refresh widget with option change
To make a widget react to a change of a given option, simply add the following to the widget:

```javascript
async entitiesReloadedEvent({loadResults}) {
    if (loadResults.getOptionNames().includes("firstDayOfWeek")) {
        // Do something.
    }        
}
```