"use client"; import { useEffect, useRef, useState } from "react"; import { AnimatePresence, motion, useSpring, useTransform } from "motion/react"; import { cn } from "@/lib/utils"; interface AnimateDigitsProps { value: string; gap?: number; className?: string; digitClassName?: string; enterStiffness?: number; enterDamping?: number; exitStiffness?: number; exitDamping?: number; direction?: "dynamic" | "up" | "down"; enterY?: number; enterBlur?: number; enterScale?: number; animationDelay?: number; } interface ExitItem { id: number; char: string; exitY: number; } let _id = 0; function DigitCell({ char, isDigit, className, enterStiffness = 170, enterDamping = 10, exitStiffness = 170, exitDamping = 15, direction = "dynamic", enterY = 32, enterBlur = 52, enterScale = 0.7, }: { char: string; isDigit: boolean; className?: string; enterStiffness?: number; enterDamping?: number; exitStiffness?: number; exitDamping?: number; direction?: "dynamic" | "up" | "down"; enterY?: number; enterBlur?: number; enterScale?: number; }) { const [exitQueue, setExitQueue] = useState([]); const prevCharRef = useRef(char); const isFirstRender = useRef(true); // Springs — jump() snaps the spring itself (position + velocity reset) const springConfig = { stiffness: enterStiffness, damping: enterDamping }; const y = useSpring(0, springConfig); const opacity = useSpring(1, springConfig); const scale = useSpring(1, springConfig); const blur = useSpring(0, springConfig); const filter = useTransform(blur, (v) => `blur(${v}px)`); useEffect(() => { if (!isDigit) return; const prev = prevCharRef.current; prevCharRef.current = char; if (isFirstRender.current) { isFirstRender.current = false; return; } if (char === prev || !/\d/.test(prev)) return; const up = direction === "dynamic" ? Number(char) > Number(prev) : direction === "up"; const id = _id++; setExitQueue((q) => { const next = [...q, { id, char: prev, exitY: up ? -enterY : enterY }]; return next.length > 3 ? next.slice(-3) : next; }); y.jump(up ? enterY : -enterY); opacity.jump(0); scale.jump(enterScale); blur.jump(enterBlur); y.set(0); opacity.set(1); scale.set(1); blur.set(0); }, [ char, isDigit, direction, enterY, enterBlur, enterScale, y, opacity, scale, blur, ]); if (!isDigit) { return {char}; } return (

*]:col-start-1 [&>*]:row-start-1", className, )} > {exitQueue.map(({ id, char: exitChar, exitY }) => ( setExitQueue((q) => q.filter((item) => item.id !== id)) } > {exitChar} ))} {char}

); } function AnimateDigits({ value, gap = 2, className, digitClassName, enterStiffness, enterDamping, exitStiffness, exitDamping, direction, enterY, enterBlur, enterScale, animationDelay = 80, }: AnimateDigitsProps) { // displayedValue is what the cells actually render — advanced one step at a time const [displayedValue, setDisplayedValue] = useState(value); const pendingQueue = useRef([]); const isAnimating = useRef(false); const timerRef = useRef | null>(null); const displayedRef = useRef(value); const processQueue = () => { if (pendingQueue.current.length === 0) { isAnimating.current = false; return; } isAnimating.current = true; const next = pendingQueue.current.shift()!; displayedRef.current = next; setDisplayedValue(next); timerRef.current = setTimeout(processQueue, animationDelay); }; useEffect(() => { if (value === displayedRef.current) return; pendingQueue.current.push(value); if (!isAnimating.current) { processQueue(); } // eslint-disable-next-line react-hooks/exhaustive-deps }, [value]); // When animationDelay changes while animating, the in-flight timer keeps the // old delay for its last tick — acceptable; no need to restart the queue. useEffect(() => { return () => { if (timerRef.current) clearTimeout(timerRef.current); }; }, []); const chars = displayedValue.split(""); return (

{chars.map((char, i) => ( ))}

); } export { AnimateDigits, type AnimateDigitsProps };