> For the complete documentation index, see [llms.txt](https://sickscoregames.gitbook.io/hud-navigation-system/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://sickscoregames.gitbook.io/hud-navigation-system/hud-navigation-element/events.md).

# Events

##  :rocket: Events

Events give you the ability to directly interact with HUD Navigation Elements when certain events happen during runtime. This way you could for example play an audio track, if an element (e.g. enemy) appears on screen.

```csharp
public void OnElementReady(HUDNavigationElement element)
{
    // Fires directly after the element got initialized and is ready.
    // It's safe to interact with the element after this event has fired.
}
```

```csharp
public void OnAppear(HUDNavigationElement element, NavigationElementType type)
{
    // Fires directly when the element appears on screen.
    // This event will fire for each feature individually!
    // Use the type parameter to check, which feature fired this event.
}
```

```csharp
public void OnDisappear(HUDNavigationElement element, NavigationElementType type)
{
    // Fires directly when the element disappears from the screen.
    // This event will fire for each feature individually!
    // Use the type parameter to check, which feature fired this event.
}
```

```csharp
public void OnEnterRadius(HUDNavigationElement element, NavigationElementType type)
{
    // Fires directly when the element enters the defined radius.
    // This event will fire for each feature individually!
    // Use the type parameter to check, which feature fired this event.
}
```

```csharp
public void OnLeaveRadius(HUDNavigationElement element, NavigationElementType type)
{
    // Fires directly when the element leaves the defined radius.
    // This event will fire for each feature individually!
    // Use the type parameter to check, which feature fired this event.
}
```


---

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