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HighScoreTable presents five career statistics styled as an arcade leaderboard. Each row slides in from the left and its score counts up from zero using a smooth quartic-ease animation, but only once the component has scrolled into the viewport — courtesy of an IntersectionObserver. The result is a memorable, gamified way to communicate experience metrics without relying on traditional CV formatting.

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Props

This component accepts no props. The score data is hardcoded inside the component and the animation is triggered automatically by scroll position.

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Usage

import HighScoreTable from './components/HighScoreTable';

// Drop it anywhere in a scrollable page
function AboutPage() {
  return (
    <section>
      <h2>By The Numbers</h2>
      <HighScoreTable />
    </section>
  );
}

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Score data

The component contains a static array of five entries:
RankInitialsScoreLabel
1YRS5YEARS CODING
2PRJ42PROJECTS SHIPPED
3PPR12PAPERS WRITTEN
4COF9999COFFEES CONSUMED
5BUG404BUGS SQUASHED
Scores are displayed zero-padded to four digits using score.toString().padStart(4, '0') — for example, 5 renders as 0005 and 404 as 0404.

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Scroll-triggered animation

An IntersectionObserver with { threshold: 0.1 } is created inside a useEffect and attached to the component’s root div via a ref. When at least 10 % of the table enters the viewport:
  1. The observer sets the isVisible state to true.
  2. The observer immediately disconnects itself so the animation only fires once per page load.
Until isVisible is true, all rows are styled with opacity-0 -translate-x-8 (translated 2 rem to the left). Once visible they transition to opacity-100 translate-x-0 with transition-all duration-1000. Each row receives a transitionDelay of index × 200ms, creating a staggered cascade.

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Counter animation

Each score value is rendered by a dedicated AnimatedCounter sub-component that accepts end (target value) and duration (milliseconds). It uses requestAnimationFrame with the following easing function: 
// Quartic ease-out: fast start, smooth deceleration
const eased = 1 - Math.pow(1 - progress, 4);
const current = Math.floor(end * eased);
Where progress is elapsed / duration, clamped to [0, 1]. The counter runs for 2000 ms per score and snaps to the exact end value on the final frame to avoid floating-point drift.

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Layout & appearance

ElementClasses
Outer containerborder-4 border-arcade-cyan pixel-border-cyan bg-arcade-black/80
Headerfont-press text-arcade-cyan animate-pulse-fast
Column headersfont-vt323 text-arcade-magenta border-b-2 border-arcade-magenta/30
Rankfont-vt323 text-arcade-muted
Scorefont-vt323 text-arcade-green glow-green font-bold tracking-widest
Initialsfont-vt323 text-arcade-white
The IntersectionObserver disconnects after the first intersection, so scrolling away and back will not replay the animation. If you need it to re-trigger on every scroll-into-view, remove the observer.disconnect() call and also reset isVisible to false when the element leaves the viewport using the isIntersecting flag in the callback.

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Customization

To update the displayed statistics, edit the scores array at the top of HighScoreTable.js. Each entry takes three fields: initials (up to 3 characters rendered right-aligned), score (a number — padded automatically to 4 digits), and label (a descriptive string shown as a tooltip or accessible label).To change the counter duration, adjust the duration prop passed to AnimatedCounter — currently hardcoded at 2000 ms per row. For very large numbers (e.g. 9999), a longer duration produces a more satisfying scroll. The easing function itself lives in the useEffect inside AnimatedCounter; swap Math.pow(1 - d, 4) for Math.pow(1 - d, 2) for a gentler ease-out, or Math.pow(1 - d, 6) for a more dramatic snap.

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