A single-file HTML photo gallery for browsing construction site photos organized in folders.

• Single HTML file - No server required, works offline
• Folder navigation - Resizable sidebar with folder tree
• YouTube-style controls - Play/pause slideshow, progress bar, fullscreen
• Thumbnail strip - Quick navigation with horizontal scroll
• Keyboard shortcuts - Arrow keys, Space (play/pause), F (fullscreen)
• Image preloading - Smooth slideshow with 2 images preloaded ahead
• Sorting options - By folder or filename (ascending/descending)
• Responsive - Works on desktop and mobile

1. Place Fotogalerie.html in the parent folder containing your image subfolders
2. Update the allImages array in the script with your image paths
3. Open the HTML file in any modern browser

project-folder/
├── Fotogalerie.html
├── 2024-01_Folder-Name/
│   ├── image1.jpg
│   └── image2.jpg
└── 2024-02_Another-Folder/
    └── image3.jpg

MIT