Codepen - Flipbook

While simple flips use CSS :target or checkboxes, complex results almost always use JavaScript to calculate mouse position, drag distance, and corner curling.

This is the engine of the flip. Animating the rotation around the Y-axis makes the page swing open like a real book door.

// Buttons document.getElementById('prevBtn').addEventListener('click', prevPage); document.getElementById('nextBtn').addEventListener('click', nextPage); flipbook codepen

// draw the unique page content based on page number // each page delivers a distinct sketch / icon and a fun fact or short phrase ctx.font = `bold $Math.floor(canvas.height * 0.09)px "Courier New", monospace`; ctx.fillStyle = '#4e3b28'; ctx.shadowBlur = 0;

body background: linear-gradient(145deg, #2c3e50 0%, #1a2632 100%); min-height: 100vh; display: flex; justify-content: center; align-items: center; font-family: 'Segoe UI', 'Poppins', 'Inter', system-ui, -apple-system, sans-serif; padding: 20px; While simple flips use CSS :target or checkboxes,

.page::before content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(0,0,0,0.35), rgba(0,0,0,0)); pointer-events: none; opacity: var(--shadow, 0);

.book width: 100%; height: 100%; position: relative; transform-style: preserve-3d; // Buttons document

window.addEventListener('mousemove', onMouseMove); window.addEventListener('mouseup', onMouseUp); );