Here's an advanced Calculator App with animations and high-level JavaScript concepts like ES6+ features, event delegation, and CSS animations. Output Features: Smooth button press animations Dark/light mode toggle Keyboard support History of calculations Error handling 1. Project Structure bash /calculator/ │── index.html │── style.css │── script.js 2. index.html html <!DOCTYPE html > < html lang = "en" > < head > < meta charset = "UTF-8" > < meta name = "viewport" content = "width=device-width, initial-scale=1.0" > < title > Advanced Calculator </ title > < link rel = "stylesheet" href = "style.css" > </ head > < body > < div class = "calculator" > < div class = "theme-toggle" > 🌙 </ div > < div class = "display" > < div id = "history...