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85:T2424,[V0_FILE]typescriptreact:file="hooks/use-shortcut.ts" isMerged="true" "use client" import { useEffect } from "react" export function clamp(value: number, [min, max]: [number, number]): number { return Math.min(Math.max(value, min), max) } export function useShortcuts(shortcuts: Record void>) { useEffect(() => { const handleKeyDown = (e: KeyboardEvent) => { const handler = shortcuts[e.key] if (handler) { e.preventDefault() handler() } } window.addEventListener("keydown", handleKeyDown) return () => window.removeEventListener("keydown", handleKeyDown) }, [shortcuts]) } [V0_FILE]typescriptreact:file="app/page.tsx" isMerged="true" import TimeMachine from "@/components/time-machine" export default function Page() { return (

) } [V0_FILE]json:file="package.json" isMerged="true" { "name": "my-v0-project", "version": "0.1.0", "private": true, "scripts": { "dev": "next dev", "build": "next build", "start": "next start", "lint": "eslint ." }, "dependencies": { "@hookform/resolvers": "^3.10.0", "@radix-ui/react-accordion": "1.2.2", "@radix-ui/react-alert-dialog": "1.1.4", "@radix-ui/react-aspect-ratio": "1.1.1", "@radix-ui/react-avatar": "1.1.2", "@radix-ui/react-checkbox": "1.1.3", "@radix-ui/react-collapsible": "1.1.2", "@radix-ui/react-context-menu": "2.2.4", "@radix-ui/react-dialog": "1.1.4", "@radix-ui/react-dropdown-menu": "2.1.4", "@radix-ui/react-hover-card": "1.1.4", "@radix-ui/react-label": "2.1.1", "@radix-ui/react-menubar": "1.1.4", "@radix-ui/react-navigation-menu": "1.2.3", "@radix-ui/react-popover": "1.1.4", "@radix-ui/react-progress": "1.1.1", "@radix-ui/react-radio-group": "1.2.2", "@radix-ui/react-scroll-area": "1.2.2", "@radix-ui/react-select": "2.1.4", "@radix-ui/react-separator": "1.1.1", "@radix-ui/react-slider": "1.2.2", "@radix-ui/react-slot": "1.1.1", "@radix-ui/react-switch": "1.1.2", "@radix-ui/react-tabs": "1.1.2", "@radix-ui/react-toast": "1.2.4", "@radix-ui/react-toggle": "1.1.1", "@radix-ui/react-toggle-group": "1.1.1", "@radix-ui/react-tooltip": "1.1.6", "@vercel/analytics": "1.3.1", "autoprefixer": "^10.4.20", "class-variance-authority": "^0.7.1", "clsx": "^2.1.1", "cmdk": "1.0.4", "date-fns": "4.1.0", "embla-carousel-react": "8.5.1", "input-otp": "1.4.1", "lucide-react": "^0.454.0", "next": "16.0.10", "next-themes": "^0.4.6", "react": "19.2.0", "react-day-picker": "9.8.0", "react-dom": "19.2.0", "react-hook-form": "^7.60.0", "react-resizable-panels": "^2.1.7", "recharts": "2.15.4", "sonner": "^1.7.4", "tailwind-merge": "^3.3.1", "tailwindcss-animate": "^1.0.7", "vaul": "^1.1.2", "zod": "3.25.76", "framer-motion": "12.23.26" }, "devDependencies": { "@tailwindcss/postcss": "^4.1.9", "@types/node": "^22", "@types/react": "^19", "@types/react-dom": "^19", "postcss": "^8.5", "tailwindcss": "^4.1.9", "tw-animate-css": "1.3.3", "typescript": "^5" } } [V0_FILE]typescriptreact:file="components/time-machine.tsx" isEdit="true" isQuickEdit="true" "use client" import React from "react" import { motion } from "framer-motion" import { useShortcuts, clamp } from "@/hooks/use-shortcut" const IMAGES = [ "https://cdn.cosmos.so/5689a5cd-92a5-4cb1-b014-263da4f55731?format=jpeg", "https://cdn.cosmos.so/c4588488-0021-4804-9c29-a43059378bfe?format=jpeg", "https://cdn.cosmos.so/de8c561b-e4e4-48f3-9068-30d63b92c43e?format=jpeg", "https://cdn.cosmos.so/207b3ba7-13ef-496b-a9cb-2a718e14a24e?format=jpeg", "https://cdn.cosmos.so/6c41e632-d300-4516-a7af-9a1f7c0aef94?format=jpeg", "https://cdn.cosmos.so/e552eaac-8251-4890-b954-e988fc4bf2e0?format=jpeg", "https://cdn.cosmos.so/5689a5cd-92a5-4cb1-b014-263da4f55731?format=jpeg", ] const FRAME_OFFSET = -30 const FRAMES_VISIBLE_LENGTH = 3 const SCROLL_THRESHOLD = 40 const BUFFER_SIZE = 8 // Render 8 cards before and after visible range (increased for fast scrolling) export default function TimeMachine({ shouldImplementPreloading = false, }: { shouldImplementPreloading?: boolean }) { // Use continuous index that can go infinite in both directions const [currentIndex, setCurrentIndex] = React.useState(0) const containerRef = React.useRef(null) const scrollAccumulator = React.useRef(0) const lastUpdateTime = React.useRef(Date.now()) const touchStartY = React.useRef(0) // Calculate which cards should be rendered (visible + buffer) const getVisibleCards = React.useCallback(() => { const start = currentIndex - BUFFER_SIZE const end = currentIndex + FRAMES_VISIBLE_LENGTH + BUFFER_SIZE const cards = [] for (let i = start; i <= end; i++) { cards.push({ index: i, imageIndex: ((i % IMAGES.length) + IMAGES.length) % IMAGES.length, // Positive modulo }) } return cards }, [currentIndex]) React.useEffect(() => { const container = containerRef.current if (!container) return const MIN_UPDATE_INTERVAL = 75 // Minimum 75ms between index changes (max ~13 changes per second) const handleWheel = (e: WheelEvent) => { e.preventDefault() scrollAccumulator.current += e.deltaY const now = Date.now() const timeSinceLastUpdate = now - lastUpdateTime.current if (Math.abs(scrollAccumulator.current) >= SCROLL_THRESHOLD) { // Only update if enough time has passed since last update if (timeSinceLastUpdate >= MIN_UPDATE_INTERVAL) { const delta = scrollAccumulator.current > 0 ? 1 : -1 setCurrentIndex((prev) => prev + delta) scrollAccumulator.current = 0 lastUpdateTime.current = now } } } const handleTouchStart = (e: TouchEvent) => { touchStartY.current = e.touches[0].clientY } const handleTouchMove = (e: TouchEvent) => { e.preventDefault() const touchY = e.touches[0].clientY const deltaY = touchStartY.current - touchY touchStartY.current = touchY scrollAccumulator.current += deltaY const now = Date.now() const timeSinceLastUpdate = now - lastUpdateTime.current if (Math.abs(scrollAccumulator.current) >= SCROLL_THRESHOLD) { if (timeSinceLastUpdate >= MIN_UPDATE_INTERVAL) { const delta = scrollAccumulator.current > 0 ? 1 : -1 setCurrentIndex((prev) => prev + delta) scrollAccumulator.current = 0 lastUpdateTime.current = now } } } container.addEventListener("wheel", handleWheel, { passive: false }) container.addEventListener("touchstart", handleTouchStart, { passive: false, }) container.addEventListener("touchmove", handleTouchMove, { passive: false, }) return () => { container.removeEventListener("wheel", handleWheel) container.removeEventListener("touchstart", handleTouchStart) container.removeEventListener("touchmove", handleTouchMove) } }, []) useShortcuts({ ArrowRight: () => { setCurrentIndex((prev) => prev + 1) }, ArrowLeft: () => { setCurrentIndex((prev) => prev - 1) }, }) const visibleCards = getVisibleCards() return (

{visibleCards.map((card) => { const offsetIndex = card.index - currentIndex const blur = currentIndex > card.index ? 2 : 0 const opacity = currentIndex > card.index ? 0 : 1 const scale = clamp(1 - offsetIndex * 0.08, [0.08, 2]) const y = clamp(offsetIndex * FRAME_OFFSET, [FRAME_OFFSET * FRAMES_VISIBLE_LENGTH, Number.POSITIVE_INFINITY]) const src = IMAGES[card.imageIndex] const image =

return ( {shouldImplementPreloading ? <>{offsetIndex < FRAMES_VISIBLE_LENGTH ? image : null} : image} ) })}

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