How does Flutter handle animations?

Flutter provides a rich set of animation APIs that help developers create smooth and visually appealing animations.

To implement animations in Flutter, you typically follow these steps:

1. Use the AnimationController to control the duration and state of the animation.
2. Create an Animation object that defines how the property will change.
3. Use the AnimatedBuilder or AnimatedWidget to rebuild the UI when the animation value changes.

For example, to create a simple fade-in effect:

class FadeInExample extends StatefulWidget { ... }

This class uses an AnimationController to control the opacity of a widget. When the animation is triggered, the widget smoothly fades in.