The entire dot field is a single Skia RuntimeEffect (SkSL) drawn in one Canvas call — all per-dot math (reveal, twinkle, falloff, rounded-rect SDF) runs on the GPU. The only per-frame JS is a tiny useDerivedValue worklet that feeds uniforms, so nothing touches the JS thread. Drag is handled by react-native-gesture-handler with a Pan gesture (minDistance 0 for zero dead zone), and the thumb snaps to discrete stops via react-native-reanimated withSpring. Haptics fire on grab and release through expo-haptics, scheduled back to the RN thread with react-native-worklets scheduleOnRN. Built for Expo SDK 56 with @shopify/react-native-skia 2.6 and react-native-reanimated 4; it runs in Expo Go, since Skia ships bundled in Expo Go as of SDK 56 (no development build needed). Works on iOS and Android.
A draggable slider whose track fills with a shimmering, GPU-rendered field of purple dots that sweep in like a wave as the thumb nears the end. The thumb springs between discrete snap stops with light haptic ticks on grab and release, and the dot field dissolves in and out as you approach or leave the max position.
A collapsing scroll header with a price chart, matched to X's coin page: as the feed slides over it, the header shrinks from its top edge and fades. Pull down and it rides with the content to reveal an arrow, with opacity and drift curves sampled frame by frame from a screen recording. Drop it into a crypto, stock or token detail screen.
A React Native camera screen that opens out of the Dynamic Island, then prints each shot as an instant photo that develops on screen. Pull down and the island grows into a live VisionCamera lens; press the shutter and a Skia print feeds out of a slot and comes up over a minute, faster if you shake it. Drop it into a photo or journaling app as its capture screen.
A long-press share menu matched frame by frame to Telegram: hold the share button, slide across recent chats and let go to send. The chosen avatar arcs into a toast and turns into a checkmark, with an envelope-to-bookmark variant for Saved Messages. Drop it into a chat, feed or post list that needs one-gesture sharing.
