# Sandbox.WebSurface.InBackgroundMode

```csharp
bool InBackgroundMode { get; set; }
```

Enable/disable low-resource background mode, where javascript and repaint timers are throttled, resources are
more aggressively purged from memory, and audio/video elements are paused. When background mode is enabled,
all HTML5 video and audio objects will execute ".pause()" and gain the property "._steam_background_paused = 1".
When background mode is disabled, any video or audio objects with that property will resume with ".play()".

Declared in [Sandbox.WebSurface](/api/Sandbox.WebSurface).
Assembly: `Sandbox.Engine`.