...For this very reason, the Discovery App is recommended for newcomers, or for those who want a "live" feeling of the new engine capabilities. The website is more suited during development when searching for specific information. In addition, the Discovery App has a collection of "Playgrounds" to play with specific components and observe how they respond to style and props changes. The new rendering API is an order of magnitude more powerful than the legacy. Custom renderers are now plain React Component instead of functions, and you have now access to the underlying renderer for rich customization. Default renderers support onPress and many more interesting props!