# EventFan

## Content

# Interface: EventFan

Viewer event raising interface

## Methods

### register()

```ts
register(eventHandler): EventHandlerUnregisterFn;
```

Registers a new event handler. The handler is invoked when the cancellation is requested.

#### Parameters

##### eventHandler

[`EventHandler`](../type-aliases/EventHandler)

Event handler function.

#### Returns

[`EventHandlerUnregisterFn`](../type-aliases/EventHandlerUnregisterFn)

Event handler unregister function.