auto-sizes/test.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 Test</title>
  <style>
    body {
      font-family: system-ui, -apple-system, sans-serif;
      max-width: 1200px;
      margin: 0 auto;
      padding: 20px;
    }

    h1 {
      margin-bottom: 10px;
    }

    .subtitle {
      color: #666;
      margin-bottom: 30px;
    }

    .test-section {
      margin-bottom: 60px;
      padding: 20px;
      background: #f5f5f5;
      border-radius: 8px;
    }

    .test-section h2 {
      margin-top: 0;
      color: #333;
    }

    .image-container {
      background: white;
      padding: 20px;
      border-radius: 4px;
      margin-bottom: 20px;
    }

    img {
      max-width: 100%;
      height: auto;
      display: block;
      border: 2px solid #ddd;
    }

    /* Demo: fade in after autosized */
    img.autosizes:not(.autosized) {
      opacity: 0.3;
    }

    img.autosized {
      opacity: 1;
      transition: opacity 0.3s;
      border-color: #4caf50;
    }

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

    .info strong {
      color: #1976d2;
    }

    .half-width {
      width: 50%;
    }

    .quarter-width {
      width: 25%;
    }

    .controls {
      position: sticky;
      top: 0;
      background: white;
      padding: 15px;
      border: 2px solid #333;
      border-radius: 8px;
      margin-bottom: 20px;
      z-index: 100;
    }

    button {
      padding: 10px 20px;
      margin-right: 10px;
      background: #1976d2;
      color: white;
      border: none;
      border-radius: 4px;
      cursor: pointer;
      font-size: 14px;
    }

    button:hover {
      background: #1565c0;
    }

    .log {
      background: #263238;
      color: #aed581;
      padding: 15px;
      border-radius: 4px;
      font-family: 'Courier New', monospace;
      font-size: 13px;
      max-height: 200px;
      overflow-y: auto;
      margin-top: 20px;
    }

    .log-entry {
      margin-bottom: 5px;
    }

    .log-entry.event {
      color: #81d4fa;
    }
  </style>
</head>
<body>
  <h1>AutoSizes Test Page</h1>
  <p class="subtitle">Testing automatic sizes calculation for responsive images with sizes="auto"</p>

  <div class="controls">
    <button onclick="updateAllSizes()">Recalculate All</button>
    <button onclick="toggleWidth()">Toggle Container Width</button>
    <button onclick="clearLog()">Clear Log</button>
  </div>

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

  <!-- Test 1: Basic image with sizes="auto" -->
  <div class="test-section">
    <h2>Test 1: Basic Image with sizes="auto"</h2>
    <div class="image-container" id="container1">
      <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"
      />
      <div class="info">
        <strong>sizes:</strong> <span id="sizes1">Not set</span><br>
        <strong>Current width:</strong> <span id="width1">-</span>px<br>
        <strong>Has autosized class:</strong> <span id="class1">No</span>
      </div>
    </div>
  </div>

  <!-- Test 2: Half width image -->
  <div class="test-section">
    <h2>Test 2: Half Width Container</h2>
    <div class="image-container half-width" id="container2">
      <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"
        src="https://via.placeholder.com/600x400?text=fallback"
        alt="Half width test"
      />
      <div class="info">
        <strong>sizes:</strong> <span id="sizes2">Not set</span><br>
        <strong>Current width:</strong> <span id="width2">-</span>px
      </div>
    </div>
  </div>

  <!-- Test 3: Picture element -->
  <div class="test-section">
    <h2>Test 3: Picture Element (correct HTML spec usage)</h2>
    <div class="image-container" id="container3">
      <picture>
        <source
          media="(min-width: 768px)"
          srcset="https://via.placeholder.com/800x600?text=Desktop+800w 800w,
                  https://via.placeholder.com/1200x900?text=Desktop+1200w 1200w"
        />
        <source
          srcset="https://via.placeholder.com/400x300?text=Mobile+400w 400w,
                  https://via.placeholder.com/600x450?text=Mobile+600w 600w"
        />
        <img
          class="autosizes"
          sizes="auto"
          srcset="https://via.placeholder.com/400x300?text=400w 400w,
                  https://via.placeholder.com/600x450?text=600w 600w"
          src="https://via.placeholder.com/400x300?text=fallback"
          alt="Picture element test"
        />
      </picture>
      <div class="info">
        <strong>img sizes:</strong> <span id="sizes3img">Not set</span><br>
        <strong>source elements:</strong> No sizes attribute (per HTML spec)<br>
        <strong>Current width:</strong> <span id="width3">-</span>px
      </div>
    </div>
  </div>

  <!-- Test 4: Quarter width container -->
  <div class="test-section">
    <h2>Test 4: Quarter Width Container</h2>
    <div class="image-container quarter-width" id="container4">
      <img
        class="autosizes"
        sizes="auto"
        srcset="https://via.placeholder.com/300x200?text=300w 300w,
                https://via.placeholder.com/600x400?text=600w 600w"
        src="https://via.placeholder.com/300x200?text=fallback"
        alt="Quarter width test"
      />
      <div class="info">
        <strong>sizes:</strong> <span id="sizes4img">Not set</span><br>
        <strong>Current width:</strong> <span id="width4">-</span>px
      </div>
    </div>
  </div>

  <!-- Test 5: data-sizes attribute -->
  <div class="test-section">
    <h2>Test 5: Using data-sizes attribute</h2>
    <p>Set config.sizesAttr = 'data-sizes' to test prefix support</p>
    <div class="image-container half-width" id="container5">
      <img
        class="autosizes"
        data-sizes="auto"
        srcset="https://via.placeholder.com/300x200?text=300w 300w,
                https://via.placeholder.com/600x400?text=600w 600w"
        src="https://via.placeholder.com/300x200?text=fallback"
        alt="data-sizes test"
        id="dataSizesImg"
      />
      <div class="info">
        <strong>data-sizes:</strong> <span id="sizes5data">Not set</span><br>
        <strong>sizes:</strong> <span id="sizes5">Not set</span><br>
        <strong>Note:</strong> Both should be set when using prefix
      </div>
    </div>
  </div>

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

    // Make autoSizes available globally for console debugging
    window.autoSizes = autoSizes;

    // Log to page
    const logContainer = document.getElementById('log');
    function log(message, type = 'info') {
      const entry = document.createElement('div');
      entry.className = `log-entry ${type}`;
      entry.textContent = `[${new Date().toLocaleTimeString()}] ${message}`;
      logContainer.appendChild(entry);
      logContainer.scrollTop = logContainer.scrollHeight;
      console.log(message);
    }

    // Clear log
    window.clearLog = function() {
      logContainer.innerHTML = '';
    };

    // Listen to beforeSizesUpdate event
    document.addEventListener('beforeSizesUpdate', (event) => {
      const elem = event.target;
      const width = event.detail.width;
      log(`beforeSizesUpdate: ${elem.tagName} width=${width}px`, 'event');
    });

    // Listen to afterSizesUpdate event
    document.addEventListener('afterSizesUpdate', (event) => {
      const elem = event.target;
      const sizes = event.detail.sizes;
      log(`afterSizesUpdate: ${elem.tagName} sizes="${sizes}"`, 'event');
    });

    // Update display info
    function updateInfo() {
      // Test 1
      const img1 = document.querySelector('#container1 img');
      document.getElementById('sizes1').textContent = img1.getAttribute('sizes') || 'auto';
      document.getElementById('width1').textContent = img1.offsetWidth;
      document.getElementById('class1').textContent = img1.classList.contains('autosized') ? 'Yes' : 'No';

      // Test 2
      const img2 = document.querySelector('#container2 img');
      document.getElementById('sizes2').textContent = img2.getAttribute('sizes') || 'auto';
      document.getElementById('width2').textContent = img2.offsetWidth;

      // Test 3
      const img3 = document.querySelector('#container3 img');
      document.getElementById('sizes3img').textContent = img3.getAttribute('sizes') || 'auto';
      document.getElementById('width3').textContent = img3.offsetWidth;

      // Test 4
      const img4 = document.querySelector('#container4 img');
      document.getElementById('sizes4img').textContent = img4.getAttribute('sizes') || 'auto';
      document.getElementById('width4').textContent = img4.offsetWidth;

      // Test 5
      const img5 = document.getElementById('dataSizesImg');
      document.getElementById('sizes5data').textContent = img5.getAttribute('data-sizes') || 'Not set';
      document.getElementById('sizes5').textContent = img5.getAttribute('sizes') || 'Not set';
    }

    // Update info on load and resize
    window.addEventListener('load', () => {
      log('Page loaded, autosizes initialized');
      updateInfo();
    });

    window.addEventListener('resize', () => {
      setTimeout(updateInfo, 150); // Wait for debounce
    });

    // Manual update button
    window.updateAllSizes = function() {
      log('Manually updating all sizes...');
      autoSizes.updateAll();
      setTimeout(updateInfo, 50);
    };

    // Toggle container width
    let isFullWidth = true;
    window.toggleWidth = function() {
      const container1 = document.getElementById('container1');
      if (isFullWidth) {
        container1.style.width = '50%';
        log('Container width set to 50%');
      } else {
        container1.style.width = '100%';
        log('Container width set to 100%');
      }
      isFullWidth = !isFullWidth;
      setTimeout(() => {
        autoSizes.updateAll();
        setTimeout(updateInfo, 50);
      }, 50);
    };

    // Initial info update after a brief delay
    setTimeout(updateInfo, 200);

    log('Test page initialized. Resize window to see sizes recalculate.');
    log('Note: Images with sizes="auto" will be updated automatically.');
  </script>
</body>
</html>