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# Behavior

Properties shared by all the behaviors you can use to affect how components react to device motion and scrolling.

```
object Behavior
```

## Discussion

A behavior defines the physics of a component and its context. The effect of a component behavior is persistent and occurs every time a person views the article. Compare that with an animation which happens just once each time a person views the component in your article.

> Note:
> You don’t use the `Behavior` object directly; instead, use the specific objects that extend it.

You can use this object in [`Component`](/documentation/AppleNewsFormat/Component).

## See Also

  <doc://com.apple.applenews/documentation/AppleNews/adding-parallax-behavior>

## Relationships

### Inherited By

[`BackgroundParallax`](/documentation/AppleNewsFormat/BackgroundParallax)

[`Springy`](/documentation/AppleNewsFormat/Springy)

[`Parallax`](/documentation/AppleNewsFormat/Parallax)

[`BackgroundMotion`](/documentation/AppleNewsFormat/BackgroundMotion)

[`Motion`](/documentation/AppleNewsFormat/Motion)

---

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