browser-life/index.html at master · tmsteph/browser-life · 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">
  <meta name="theme-color" content="#07100d">
  <meta name="description" content="A tiny evolving ecosystem that lives entirely in your browser.">
  <title>Browser Life — an evolving world</title>
  <link rel="stylesheet" href="static/style.css">
</head>
<body>
  <main class="shell">
    <header class="hero">
      <div>
        <p class="eyebrow">Browser Life · tmsteph</p>
        <h1>We've got life.</h1>
        <p class="intro">
          Every moving spark is a creature with inherited genes for speed, sight, size, and color.
          Food creates energy. Energy creates children. Children mutate. The world decides what survives.
        </p>
      </div>
      <p class="hero-note">Tap or click the world to make a burst of food and change its future.</p>
    </header>

    <section class="world-card" aria-label="Browser Life simulation">
      <canvas id="world" aria-label="Animated evolving ecosystem"></canvas>
      <div class="stats" aria-live="polite">
        <div class="stat"><strong id="population">0</strong><span>creatures</span></div>
        <div class="stat"><strong id="food-count">0</strong><span>food</span></div>
        <div class="stat"><strong id="generation">1</strong><span>highest generation</span></div>
        <div class="stat"><strong id="avg-speed">0</strong><span>average speed</span></div>
        <div class="stat"><strong id="births">0</strong><span>births</span></div>
      </div>
    </section>

    <section class="control-panel" aria-label="World controls">
      <div class="controls">
        <div class="control">
          <label for="food-rate">Food rain</label>
          <input id="food-rate" type="range" min="1" max="10" step="1" value="4">
          <output id="food-rate-value">4</output>
        </div>
        <div class="control">
          <label for="mutation-rate">Mutation</label>
          <input id="mutation-rate" type="range" min="0.02" max="0.35" step="0.01" value="0.12">
          <output id="mutation-rate-value">12%</output>
        </div>
        <div class="control">
          <label for="time-scale">Time</label>
          <input id="time-scale" type="range" min="0.25" max="4" step="0.25" value="1">
          <output id="time-scale-value">1×</output>
        </div>
      </div>

      <div class="actions">
        <button id="pause" type="button" aria-pressed="false">Pause</button>
        <button id="chaos" class="primary" type="button">Inject chaos</button>
        <button id="reset" type="button">New universe</button>
      </div>
    </section>

    <p class="footer-note">
      No server. No database. No framework. Just JavaScript, natural selection, and a canvas.
      The original Terra.js experiment is still preserved in the repository.
    </p>
  </main>

  <script src="static/js/life.js"></script>
  <script>
    const controls = [
      ['food-rate', 'food-rate-value', (value) => value],
      ['mutation-rate', 'mutation-rate-value', (value) => `${Math.round(value * 100)}%`],
      ['time-scale', 'time-scale-value', (value) => `${value}×`]
    ];

    for (const [inputId, outputId, format] of controls) {
      const input = document.getElementById(inputId);
      const output = document.getElementById(outputId);
      const sync = () => { output.value = format(Number(input.value)); };
      input.addEventListener('input', sync);
      sync();
    }
  </script>
</body>
</html>