reaction-timer/reaction_timer.html at main · laneyweb/reaction-timer · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Reaction Timer</title>
<link href="https://fonts.googleapis.com/css2?family=Oxanium:wght@400;600;700&family=Rajdhani:wght@400;600;700&display=swap" rel="stylesheet">
<style>
  * { margin: 0; padding: 0; box-sizing: border-box; }

  body {
    font-family: 'Rajdhani', sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: #1a1a2e;
    color: #eee;
    user-select: none;
  }

  .game {
    text-align: center;
    width: 400px;
  }

  h1 { font-family: 'Oxanium', sans-serif; font-size: 2rem; margin-bottom: 1.5rem; }

  .box {
    width: 300px;
    height: 200px;
    margin: 0 auto 1.5rem;
    border-radius: 12px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    transition: background 0.1s;
    background: #16213e;
    border: 2px solid #0f3460;
  }

  .box.waiting { background: #16213e; }
  .box.ready   { background: #0f3460; }
  .box.go      { background: #e94560; }

  .box .msg {
    font-family: 'Oxanium', sans-serif;
    font-size: 1.4rem;
    font-weight: 700;
  }

  .box .sub {
    font-size: 0.85rem;
    opacity: 0.7;
    margin-top: 0.4rem;
  }

  .stats {
    display: flex;
    justify-content: space-around;
    margin-bottom: 1.5rem;
  }

  .stat { font-size: 0.9rem; }
  .stat span { font-family: 'Oxanium', sans-serif; display: block; font-size: 1.6rem; font-weight: 700; }

  button {
    padding: 0.6rem 1.5rem;
    font-size: 1rem;
    border: none;
    border-radius: 8px;
    background: #e94560;
    color: #fff;
    cursor: pointer;
    font-weight: 600;
  }

  button:hover { opacity: 0.9; }

  .history {
    margin-top: 1.5rem;
    font-size: 0.85rem;
    opacity: 0.7;
  }

  .history span { margin: 0 4px; }
</style>
</head>
<body>
<div class="game">
  <h1>Reaction Timer</h1>

  <div class="box waiting" id="box">
    <div class="msg">Press to Start</div>
    <div class="sub">Wait for red, then press!</div>
  </div>

  <div class="stats">
    <div class="stat">Last <span id="last">—</span></div>
    <div class="stat">Best <span id="best">—</span></div>
    <div class="stat">Average <span id="avg">—</span></div>
  </div>

  <button id="resetBtn">Reset Stats</button>
  <div class="history" id="history"></div>
</div>

<script>
  const audioCtx = new (window.AudioContext || window.webkitAudioContext)();

  function playBlip() {
    const o = audioCtx.createOscillator();
    const g = audioCtx.createGain();
    o.type = 'sine';
    o.frequency.value = 1000;
    g.gain.setValueAtTime(0.3, audioCtx.currentTime);
    g.gain.exponentialRampToValueAtTime(0.001, audioCtx.currentTime + 0.08);
    o.connect(g).connect(audioCtx.destination);
    o.start(); o.stop(audioCtx.currentTime + 0.08);
  }

  function playBlop() {
    const o = audioCtx.createOscillator();
    const g = audioCtx.createGain();
    o.type = 'sine';
    o.frequency.setValueAtTime(600, audioCtx.currentTime);
    o.frequency.exponentialRampToValueAtTime(200, audioCtx.currentTime + 0.1);
    g.gain.setValueAtTime(0.3, audioCtx.currentTime);
    g.gain.exponentialRampToValueAtTime(0.001, audioCtx.currentTime + 0.1);
    o.connect(g).connect(audioCtx.destination);
    o.start(); o.stop(audioCtx.currentTime + 0.1);
  }

  function playBurrb() {
    const o = audioCtx.createOscillator();
    const g = audioCtx.createGain();
    o.type = 'square';
    o.frequency.value = 150;
    g.gain.setValueAtTime(0.3, audioCtx.currentTime);
    g.gain.exponentialRampToValueAtTime(0.001, audioCtx.currentTime + 0.3);
    o.connect(g).connect(audioCtx.destination);
    o.start();
    o.stop(audioCtx.currentTime + 0.3);
  }

  const box      = document.getElementById('box');
  const msg      = box.querySelector('.msg');
  const sub      = box.querySelector('.sub');
  const elLast   = document.getElementById('last');
  const elBest   = document.getElementById('best');
  const elAvg    = document.getElementById('avg');
  const elHist   = document.getElementById('history');
  const resetBtn = document.getElementById('resetBtn');

  let state     = 'idle';   // idle | waiting | go
  let startTime = 0;
  let times     = JSON.parse(localStorage.getItem('rt_times') || '[]');

  function updateStats() {
    if (!times.length) {
      elLast.textContent = '—';
      elBest.textContent = '—';
      elAvg.textContent  = '—';
      elHist.textContent = '';
      return;
    }
    elLast.textContent = times[times.length - 1] + ' ms';
    elBest.textContent = Math.min(...times) + ' ms';
    elAvg.textContent  = Math.round(times.reduce((a, b) => a + b, 0) / times.length) + ' ms';
    elHist.textContent = 'Recent: ' + times.slice(-5).reverse().map(t => t + 'ms').join(', ');
  }

  function startRound() {
    state = 'waiting';
    box.className = 'box waiting';
    msg.textContent = 'Wait for red...';
    sub.textContent = "Don't click yet!";
    playBlip();

    const delay = Math.random() * 2000 + 1000; // 1–3 seconds
    setTimeout(() => {
      if (state !== 'waiting') return;
      state = 'go';
      box.className = 'box go';
      msg.textContent = 'PRESS NOW!';
      sub.textContent = '';
      startTime = performance.now();
    }, delay);
  }

  box.addEventListener('mousedown', (e) => {
    e.preventDefault();
    if (state === 'idle') {
      startRound();
      return;
    }
    if (state === 'waiting') {
      // Pressed too early
      state = 'idle';
      box.className = 'box waiting';
      msg.textContent = 'Too early!';
      sub.textContent = 'Press to try again';
      playBurrb();
      return;
    }
    if (state === 'go') {
      const reaction = Math.round(performance.now() - startTime);
      times.push(reaction);
      localStorage.setItem('rt_times', JSON.stringify(times));
      updateStats();

      state = 'idle';
      box.className = 'box waiting';
      msg.textContent = reaction + ' ms';
      sub.textContent = 'Press to play again';
      playBlop();
    }
  });

  resetBtn.addEventListener('click', () => {
    times = [];
    localStorage.removeItem('rt_times');
    updateStats();
    state = 'idle';
    box.className = 'box waiting';
    msg.textContent = 'Press to Start';
    sub.textContent = 'Wait for red, then press!';
  });

  updateStats();
</script>
</body>
</html>