eclipse/index.html at main · staffanu/eclipse · 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" />
    <title>Eclipse Explorer</title>
    <link
      rel="stylesheet"
      href="https://unpkg.com/leaflet@1.9.4/dist/leaflet.css"
      integrity="sha256-p4NxAoJBhIIN+hmNHrzRCf9tD/miZyoHS5obTRR9BMY="
      crossorigin=""
    />
    <link rel="stylesheet" href="./src/style.css" />
    <script type="importmap">
      {
        "imports": {
          "astronomy-engine": "https://esm.run/astronomy-engine@2.1.19",
          "three": "https://esm.run/three@0.160.0",
          "leaflet": "https://esm.run/leaflet@1.9.4"
        }
      }
    </script>
  </head>
  <body>
    <aside id="sidebar">
      <h1>Eclipse Explorer</h1>

      <section class="control date-control">
        <label for="year-input">Eclipse near year</label>
        <div class="row">
          <button id="prev-eclipse" aria-label="Previous eclipse">&larr;</button>
          <span id="day-display" class="date-part"></span>
          <span id="month-display" class="date-part"></span>
          <input type="number" id="year-input" value="2026" min="-3000" max="9999" step="1" inputmode="numeric" />
          <button id="next-eclipse" aria-label="Next eclipse">&rarr;</button>
          <span class="mobile-buttons">
            <button class="view-toggle icon-btn active" data-view="map" aria-label="Toggle map view" title="Map">🗺&#xFE0E;</button>
            <button class="view-toggle icon-btn active" data-view="scene" aria-label="Toggle 3D view" title="3D">🌐&#xFE0E;</button>
            <button class="view-toggle icon-btn active" data-view="local" aria-label="Toggle local view" title="Local">☀&#xFE0E;</button>
            <button id="more-toggle" class="icon-btn" type="button" aria-label="Details" title="Details">&#x24D8;</button>
          </span>
        </div>
      </section>

      <div id="more-controls">
        <div class="more-header">
          <span>Details</span>
          <button id="more-close" type="button" aria-label="Close details">×</button>
        </div>

        <p class="hint" id="date-hint">Type a year and the nearest eclipse is shown. Use &larr;&nbsp;/&nbsp;&rarr; to step. Range: roughly &minus;3000 to +7000; uncertainty grows quickly outside &plusmn;500&nbsp;y of today.</p>

        <section class="control">
          <label>Observer</label>
          <div class="row">
            <input type="number" id="obs-lat" value="59.32" step="0.01" />
            <input type="number" id="obs-lon" value="18.07" step="0.01" />
          </div>
          <p class="hint">latitude, longitude (deg). Click on the map to set.</p>
        </section>

        <section class="control">
          <label class="checkbox-label">
            <input type="checkbox" id="show-footprint" checked />
            Show penumbra footprint
          </label>
          <p class="hint">Yellow region shows where any partial eclipse is visible from the ground at some point during the event.</p>
        </section>

        <section id="info" class="control"></section>

        <section class="control">
          <label>&Delta;T uncertainty (1&sigma;)</label>
          <div id="dt-info" class="hint"></div>
        </section>

        <footer>
          <p class="hint">
            Geometry from <a href="https://github.com/cosinekitty/astronomy" target="_blank" rel="noopener">astronomy-engine</a>.
            Long-term &Delta;T from Morrison &amp; Stephenson (2004) parabola; 1&sigma; uncertainty per
            Stephenson, Morrison &amp; Hohenkerk (2016).
          </p>
        </footer>
      </div>
    </aside>
    <div id="more-backdrop"></div>

    <main>
      <div id="time-control">
        <span id="time-display">peak</span>
        <input type="range" id="time-slider" min="-120" max="120" value="0" step="0.05" />
        <label class="header-toggle" id="live-label" title="Follow the current clock time">
          <input type="checkbox" id="live-time" />
          Live
        </label>
      </div>

      <section id="map-panel" class="panel">
        <header id="map-header">Global path &mdash; umbral centerline with &Delta;T uncertainty band</header>
        <div id="map"></div>
      </section>

      <section id="scene-panel" class="panel">
        <header>
          <span>3D Sun &middot; Moon &middot; Earth (not to scale)</span>
          <label class="header-toggle">
            <input type="checkbox" id="surface-shadow" />
            Shadow on surface
          </label>
        </header>
        <div id="scene"></div>
      </section>

      <section id="local-panel" class="panel">
        <header>Local view &mdash; Sun disk with Moon transit</header>
        <div id="local"></div>
      </section>
    </main>

    <script type="module" src="./src/main.js"></script>
  </body>
</html>