```python exec
import reflex as rx

from pcweb.pages.docs import api_reference
```

# Special Events

Reflex also has built-in special events can be found in the [reference]({api_reference.special_events.path}).

For example, an event handler can trigger an alert on the browser.

```python demo exec
class SpecialEventsState(rx.State):
    def alert(self):
        return rx.window_alert("Hello World!")

def special_events_example():
    return rx.button("Alert", on_click=SpecialEventsState.alert)
```