/** @jsxImportSource react */ import { useEffect, useState } from "react"; const TICK_INTERVAL_MS = 100; const PULSE_ELEMENT_COUNT = 24; interface PulseElement { id: number; hue: number; } const MetricCard = (props: { label: string; value: string; valueColor?: string }) => (

{props.label}

{props.value}

); export const LiveCounter = () => { const [count, setCount] = useState(0); const [timestamp, setTimestamp] = useState(Date.now()); const [pulses, setPulses] = useState>(() => Array.from({ length: PULSE_ELEMENT_COUNT }, (_, index) => ({ id: index, hue: (index / PULSE_ELEMENT_COUNT) * 360, })), ); useEffect(() => { const intervalId = setInterval(() => { setCount((previous) => previous + 1); setTimestamp(Date.now()); setPulses((previousPulses) => previousPulses.map((pulse) => ({ id: pulse.id, hue: (pulse.hue + 5) % 360, })), ); }, TICK_INTERVAL_MS); return () => clearInterval(intervalId); }, []); const elapsedSeconds = ((count * TICK_INTERVAL_MS) / 1000).toFixed(1); return (

Live Updates

Each element below re-renders every {TICK_INTERVAL_MS}ms via React useState + setInterval. Activate react-grab (Alt) to verify the freeze-updates system stops these React renders while you're selecting.

Color-shifting grid

{pulses.map((pulse) => (

))}

); };