openhands
c1cc1fdc1c
AnimatedCounter restarted from 0 on every online-count cache refresh (~10s) because the effect depended on value. Rewrote it as a single requestAnimationFrame animation with ease-out; changes to value after the animation only update the display statically.
58 lines
1.2 KiB
TypeScript
58 lines
1.2 KiB
TypeScript
"use client";
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import { motion, useInView } from "motion/react";
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import { useEffect, useRef, useState } from "react";
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export function AnimatedCounter({
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value,
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suffix = "",
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}: {
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value: number;
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suffix?: string;
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}) {
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const ref = useRef<HTMLSpanElement>(null);
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const isInView = useInView(ref, { once: true, margin: "-50px" });
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const started = useRef(false);
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const [display, setDisplay] = useState(0);
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useEffect(() => {
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if (!isInView) return;
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if (started.current) {
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setDisplay(value);
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return;
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}
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started.current = true;
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const duration = 1200;
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const start = performance.now();
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let raf = 0;
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const tick = (now: number) => {
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const progress = Math.min((now - start) / duration, 1);
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const eased = 1 - (1 - progress) ** 3;
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setDisplay(Math.round(eased * value));
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if (progress < 1) {
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raf = requestAnimationFrame(tick);
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} else {
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setDisplay(value);
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}
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};
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raf = requestAnimationFrame(tick);
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return () => cancelAnimationFrame(raf);
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}, [isInView, value]);
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return (
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<motion.span
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ref={ref}
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initial={{ opacity: 0, y: 12 }}
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animate={isInView ? { opacity: 1, y: 0 } : {}}
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transition={{ duration: 0.5, ease: "easeOut" }}
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>
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{display.toLocaleString()}
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{suffix}
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</motion.span>
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);
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}
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