Native XAML Behaviors support makes it easier to add interactivity to your UWP applications.

Your requests to grow the XAML Behaviors platform and bring them forward to support UWP app development have been heard. Today we announce the next step: XAML Behaviors natively supported for UWP and shipping as a NuGet package (for both native and managed projects). Additionally, to build a vibrant community around the platform, Behaviors are open source and on GitHub. Now, you can help influence the future direction of Behaviors.

Read the source article at Windows Blog