auto-sizes/test-resize.html at master · yournextagency/auto-sizes · 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>AutoSizes Resize Test</title>
  <style>
    body {
      font-family: system-ui;
      padding: 20px;
    }

    .container {
      background: #f0f0f0;
      padding: 20px;
      margin-bottom: 20px;
      transition: width 0.3s;
    }

    .resizable {
      width: 600px;
      border: 2px solid #333;
    }

    img {
      max-width: 100%;
      height: auto;
      border: 2px solid #4caf50;
    }

    .controls {
      position: fixed;
      top: 20px;
      right: 20px;
      background: white;
      padding: 15px;
      border: 2px solid #333;
      border-radius: 8px;
    }

    button {
      display: block;
      width: 100%;
      padding: 10px;
      margin-bottom: 10px;
      background: #1976d2;
      color: white;
      border: none;
      border-radius: 4px;
      cursor: pointer;
    }

    button:hover {
      background: #1565c0;
    }

    .info {
      background: #e3f2fd;
      padding: 10px;
      margin-top: 10px;
      border-radius: 4px;
      font-family: monospace;
      font-size: 14px;
    }

    .log {
      position: fixed;
      bottom: 20px;
      right: 20px;
      width: 300px;
      max-height: 200px;
      overflow-y: auto;
      background: #263238;
      color: #aed581;
      padding: 10px;
      border-radius: 4px;
      font-family: monospace;
      font-size: 12px;
    }
  </style>
</head>
<body>
  <h1>AutoSizes Resize Test</h1>

  <div class="controls">
    <button onclick="setWidth(300)">300px</button>
    <button onclick="setWidth(600)">600px</button>
    <button onclick="setWidth(900)">900px</button>
    <button onclick="window.dispatchEvent(new Event('resize'))">Trigger Resize</button>
    <button onclick="updateInfo()">Update Info</button>
  </div>

  <div class="container resizable" id="resizable">
    <h2>Resizable Container</h2>
    <p>Container width: <span id="containerWidth">600</span>px</p>

    <img
      class="autosizes"
      sizes="auto"
      srcset="https://via.placeholder.com/300x200?text=300w 300w,
              https://via.placeholder.com/600x400?text=600w 600w,
              https://via.placeholder.com/900x600?text=900w 900w,
              https://via.placeholder.com/1200x800?text=1200w 1200w"
      src="https://via.placeholder.com/600x400?text=fallback"
      alt="Test image"
      id="testImg"
    />

    <div class="info">
      <div><strong>sizes attribute:</strong> <span id="sizesValue">-</span></div>
      <div><strong>img.offsetWidth:</strong> <span id="imgWidth">-</span>px</div>
      <div><strong>Has autosized class:</strong> <span id="hasClass">-</span></div>
      <div><strong>_autosizesWidth:</strong> <span id="internalWidth">-</span></div>
    </div>
  </div>

  <div class="log" id="log"></div>

  <script type="module">
    import autoSizes from './index.js';

    // Make available globally
    window.autoSizes = autoSizes;

    const log = (msg) => {
      const logEl = document.getElementById('log');
      const time = new Date().toLocaleTimeString();
      logEl.innerHTML = `[${time}] ${msg}<br>` + logEl.innerHTML;
      console.log(`[${time}] ${msg}`);
    };

    // Log resize events
    let resizeCount = 0;
    window.addEventListener('resize', () => {
      resizeCount++;
      log(`Resize event #${resizeCount}`);
    });

    // Log custom events
    document.addEventListener('beforeSizesUpdate', (e) => {
      log(`beforeSizesUpdate: width=${e.detail.width}`);
    });

    document.addEventListener('afterSizesUpdate', (e) => {
      log(`afterSizesUpdate: sizes="${e.detail.sizes}"`);
      updateInfo();
    });

    window.setWidth = (width) => {
      const container = document.getElementById('resizable');
      container.style.width = width + 'px';
      document.getElementById('containerWidth').textContent = width;
      log(`Container width set to ${width}px`);

      // Wait for DOM update, then trigger resize
      setTimeout(() => {
        log('Dispatching resize event...');
        window.dispatchEvent(new Event('resize'));
      }, 50);
    };

    window.updateInfo = () => {
      const img = document.getElementById('testImg');
      document.getElementById('sizesValue').textContent = img.getAttribute('sizes') || 'auto';
      document.getElementById('imgWidth').textContent = img.offsetWidth;
      document.getElementById('hasClass').textContent = img.classList.contains('autosized') ? 'Yes' : 'No';
      document.getElementById('internalWidth').textContent = img._autosizesWidth || 'not set';
    };

    // Initial info update
    setTimeout(() => {
      log('Page loaded, library initialized');
      updateInfo();
    }, 200);
  </script>
</body>
</html>