stx/examples/defer-teleport-demo.stx at main · stacksjs/stx · GitHub

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<script server>
const title = "STX Defer & Teleport Demo"
const heavyContent = "This content was lazily loaded!"
const modalTitle = "Teleported Modal"
</script>

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>{{ title }}</title>
  <style>
    * { box-sizing: border-box; margin: 0; padding: 0; }
    body {
      font-family: system-ui, -apple-system, sans-serif;
      background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
      color: #e4e4e7;
      min-height: 100vh;
      padding: 2rem;
    }
    .container { max-width: 800px; margin: 0 auto; }
    h1 {
      font-size: 2.5rem;
      margin-bottom: 2rem;
      background: linear-gradient(90deg, #a78bfa, #60a5fa);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    h2 {
      font-size: 1.5rem;
      margin: 2rem 0 1rem;
      color: #a78bfa;
    }
    .card {
      background: rgba(255,255,255,0.05);
      border: 1px solid rgba(255,255,255,0.1);
      border-radius: 12px;
      padding: 1.5rem;
      margin-bottom: 1.5rem;
    }
    .skeleton {
      background: linear-gradient(90deg, #2a2a3e 25%, #3a3a4e 50%, #2a2a3e 75%);
      background-size: 200% 100%;
      animation: shimmer 1.5s infinite;
      border-radius: 8px;
      height: 100px;
    }
    @keyframes shimmer {
      0% { background-position: 200% 0; }
      100% { background-position: -200% 0; }
    }
    .spinner {
      width: 40px;
      height: 40px;
      border: 3px solid rgba(255,255,255,0.1);
      border-top-color: #a78bfa;
      border-radius: 50%;
      animation: spin 1s linear infinite;
      margin: 1rem auto;
    }
    @keyframes spin {
      to { transform: rotate(360deg); }
    }
    .loaded-content {
      background: linear-gradient(135deg, #4c1d95 0%, #1e40af 100%);
      padding: 1.5rem;
      border-radius: 8px;
      text-align: center;
    }
    .btn {
      background: linear-gradient(135deg, #7c3aed 0%, #2563eb 100%);
      color: white;
      border: none;
      padding: 0.75rem 1.5rem;
      border-radius: 8px;
      cursor: pointer;
      font-size: 1rem;
      transition: transform 0.2s, box-shadow 0.2s;
    }
    .btn:hover {
      transform: translateY(-2px);
      box-shadow: 0 10px 20px rgba(124, 58, 237, 0.3);
    }
    /* Modal styles */
    .modal-overlay {
      position: fixed;
      inset: 0;
      background: rgba(0,0,0,0.7);
      display: flex;
      align-items: center;
      justify-content: center;
      z-index: 1000;
      opacity: 0;
      visibility: hidden;
      transition: opacity 0.3s, visibility 0.3s;
    }
    .modal-overlay.active {
      opacity: 1;
      visibility: visible;
    }
    .modal {
      background: #1a1a2e;
      border: 1px solid rgba(255,255,255,0.1);
      border-radius: 16px;
      padding: 2rem;
      max-width: 500px;
      width: 90%;
      transform: scale(0.9);
      transition: transform 0.3s;
    }
    .modal-overlay.active .modal {
      transform: scale(1);
    }
    .modal h3 {
      font-size: 1.5rem;
      margin-bottom: 1rem;
      color: #a78bfa;
    }
    .modal p { margin-bottom: 1.5rem; color: #a1a1aa; }
    #modals-container { position: fixed; z-index: 1000; }
  </style>
</head>
<body>
  <div class="container">
    <h1>{{ title }}</h1>

    <!-- ===================== -->
    <!-- @defer Examples       -->
    <!-- ===================== -->
    <h2>@defer - Lazy Loading</h2>

    <!-- Defer on Visible (Intersection Observer) -->
    <div class="card">
      <h3 style="margin-bottom: 1rem;">Load on Scroll (visible)</h3>
      <p style="color: #a1a1aa; margin-bottom: 1rem;">
        Scroll down to load this content. Uses IntersectionObserver.
      </p>

      @defer(on: 'visible')
        <div class="loaded-content">
          <p>{{ heavyContent }}</p>
          <p style="font-size: 0.875rem; opacity: 0.7; margin-top: 0.5rem;">
            Loaded when scrolled into view
          </p>
        </div>
      @placeholder
        <div class="skeleton"></div>
      @loading
        <div class="spinner"></div>
      @enddefer
    </div>

    <!-- Defer on Hover -->
    <div class="card">
      <h3 style="margin-bottom: 1rem;">Load on Hover</h3>
      <p style="color: #a1a1aa; margin-bottom: 1rem;">
        Hover over this area to load the content.
      </p>

      @defer(on: 'hover')
        <div class="loaded-content">
          <p>Loaded on hover!</p>
        </div>
      @placeholder
        <div style="padding: 2rem; text-align: center; border: 2px dashed rgba(255,255,255,0.2); border-radius: 8px;">
          Hover me to load content
        </div>
      @enddefer
    </div>

    <!-- Defer on Interaction -->
    <div class="card">
      <h3 style="margin-bottom: 1rem;">Load on Interaction</h3>
      <p style="color: #a1a1aa; margin-bottom: 1rem;">
        Click or tap this area to load the content.
      </p>

      @defer(on: 'interaction')
        <div class="loaded-content">
          <p>Loaded on click/tap!</p>
        </div>
      @placeholder
        <div style="padding: 2rem; text-align: center; border: 2px dashed rgba(255,255,255,0.2); border-radius: 8px; cursor: pointer;">
          Click me to load content
        </div>
      @enddefer
    </div>

    <!-- Defer with Timer -->
    <div class="card">
      <h3 style="margin-bottom: 1rem;">Load after 2 seconds</h3>
      <p style="color: #a1a1aa; margin-bottom: 1rem;">
        This content will load automatically after 2 seconds.
      </p>

      @defer(on: 'timer(2000)')
        <div class="loaded-content">
          <p>Loaded after 2 second delay!</p>
        </div>
      @placeholder
        <div style="padding: 2rem; text-align: center; border: 2px dashed rgba(255,255,255,0.2); border-radius: 8px;">
          Loading in 2 seconds...
        </div>
      @loading
        <div class="spinner"></div>
      @enddefer
    </div>

    <!-- Defer on Idle -->
    <div class="card">
      <h3 style="margin-bottom: 1rem;">Load when Idle</h3>
      <p style="color: #a1a1aa; margin-bottom: 1rem;">
        Uses requestIdleCallback to load when browser is idle.
      </p>

      @defer(on: 'idle')
        <div class="loaded-content">
          <p>Loaded when browser was idle!</p>
        </div>
      @placeholder
        <div class="skeleton" style="height: 60px;"></div>
      @enddefer
    </div>

    <!-- ===================== -->
    <!-- @teleport Examples    -->
    <!-- ===================== -->
    <h2>@teleport - DOM Portals</h2>

    <div class="card">
      <h3 style="margin-bottom: 1rem;">Modal with Teleport</h3>
      <p style="color: #a1a1aa; margin-bottom: 1rem;">
        The modal content is teleported to #modals-container at the end of body,
        escaping this card's stacking context.
      </p>

      <button class="btn" onclick="toggleModal()">Open Modal</button>

      @teleport('#modals-container')
        <div class="modal-overlay" id="demo-modal">
          <div class="modal">
            <h3>{{ modalTitle }}</h3>
            <p>
              This modal was teleported from inside a card component to
              #modals-container at the end of the body. This ensures proper
              z-index stacking regardless of parent elements.
            </p>
            <button class="btn" onclick="toggleModal()">Close</button>
          </div>
        </div>
      @endteleport
    </div>

    <div class="card">
      <h3 style="margin-bottom: 1rem;">Notification Teleport</h3>
      <p style="color: #a1a1aa; margin-bottom: 1rem;">
        Notifications are teleported to a fixed container.
      </p>

      <button class="btn" onclick="showNotification()">Show Notification</button>

      @teleport('#notifications-container')
        <div class="notification" id="demo-notification" style="
          position: fixed;
          top: 1rem;
          right: 1rem;
          background: linear-gradient(135deg, #059669 0%, #0d9488 100%);
          color: white;
          padding: 1rem 1.5rem;
          border-radius: 8px;
          box-shadow: 0 10px 40px rgba(0,0,0,0.3);
          transform: translateX(150%);
          transition: transform 0.3s ease;
          z-index: 1001;
        ">
          Notification teleported to top-right!
        </div>
      @endteleport
    </div>

  </div>

  <!-- Teleport containers -->
  <div id="modals-container"></div>
  <div id="notifications-container"></div>

  <script client>
    function toggleModal() {
      const modal = document.getElementById('demo-modal');
      if (modal) {
        modal.classList.toggle('active');
      }
    }

    function showNotification() {
      const notification = document.getElementById('demo-notification');
      if (notification) {
        notification.style.transform = 'translateX(0)';
        setTimeout(() => {
          notification.style.transform = 'translateX(150%)';
        }, 3000);
      }
    }

    // Close modal on overlay click
    document.addEventListener('click', (e) => {
      if (e.target.classList.contains('modal-overlay')) {
        toggleModal();
      }
    });

    // Close modal on Escape key
    document.addEventListener('keydown', (e) => {
      if (e.key === 'Escape') {
        const modal = document.getElementById('demo-modal');
        if (modal && modal.classList.contains('active')) {
          toggleModal();
        }
      }
    });
  </script>

</body>
</html>