🖥️ Chapter 54: The Fullscreen API

Fullscreen Video Players & Web Gaming

**Part 11: HTML5 APIs Part 2** — Chapter 54: Fullscreen API

LEARNING OBJECTIVES ⌵

Build custom full-screen video and WebGL gaming controls.
Manage auto-hiding control docks with idle cursor timers.
Bind standard full-screen keyboard shortcuts (F, Double-Click).
Utilize the Pointer Lock API (requestPointerLock()) for 3D first-person camera gaming.

🎬 INTERACTIVE VISUAL PIPELINE Core Architecture Simulation

🌐

1. Input

Directives & Tags

⚙️

2. Parse

Tokenizer & AST

🌳

3. Layout

Box Model & Flow

🎨

4. Render

GPU Paint & Composite

PHASE 1: INPUT & DIRECTIVES

Browser receives declarative markup stream, parsing tag tokens and initializing component state.

💻 Interactive Code Playground

SYS: ACTIVE

HULL: 98%

CORE: STABLE

NET: ONLINE

HTML STARSHIP CODE TERMINAL playground.html

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Fullscreen Media Player</title>
  <style>
    .player-container { position: relative; width: 640px; background: #000; overflow: hidden; }
    .player-container:fullscreen { width: 100vw; height: 100vh; }
    .controls { position: absolute; bottom: 0; left: 0; right: 0; padding: 1rem; background: linear-gradient(transparent, rgba(0,0,0,0.8)); display: flex; justify-content: flex-end; transition: opacity 0.3s; }
    .controls.hidden { opacity: 0; pointer-events: none; }
  </style>
</head>
<body>
  <div class="player-container" id="player">
    <video src="https://commondatastorage.googleapis.com/gtv-videos-bucket/sample/BigBuckBunny.mp4" width="100%" id="video"></video>
    <div class="controls" id="controls">
      <button id="btn-fs" style="padding: 0.5rem 1rem; background: #3b82f6; color: white; border: none; border-radius: 4px; cursor: pointer;">⛶ Fullscreen</button>
    </div>
  </div>

btnFs.addEventListener('click', () => {
      if (!document.fullscreenElement) {
        player.requestFullscreen();
      } else {
        document.exitFullscreen();
      }
    });

// Auto-hide controls dock on mouse idle in fullscreen
    player.addEventListener('mousemove', () => {
      controls.classList.remove('hidden');
      clearTimeout(idleTimer);
      if (document.fullscreenElement) {
        idleTimer = setTimeout(() => controls.classList.add('hidden'), 2500);
      }
    });
  </script>
</body>
</html>

LIVE RENDER & DIAGNOSTICS CORE TEMP: 45°C

INSPECTING DOM: VALID

TAGS: SCANNING...

📌 Key Takeaways

Always target the outer wrapper container for fullscreen rather than the <video> element itself to preserve custom UI overlays.
Use element.requestPointerLock() in full-screen gaming to lock the mouse cursor for infinite 3D camera rotation.
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❓ Knowledge Check

1. Which of the following is correct?

A) - Always target the outer wrapper container for fullscreen rather than the <video> element itself to preserve custom UI overlays. B) The opposite of the above statement is true.

2. Which of the following is correct?

A) - Use element.requestPointerLock() in full-screen gaming to lock the mouse cursor for infinite 3D camera rotation. B) The opposite of the above statement is true.

👨‍🚀 CADET FLIGHT DOSSIER

CADET EXPLORER

💻 Interactive Code Playground

📌 Key Takeaways

❓ Knowledge Check