.page-1 { background-color: #f0f0f0; transform: rotateY(0deg); }
document.querySelector('.flipbook-container').addEventListener('click', () => { angle += 90; page += 1; flipbook.style.transform = `rotateY(${angle}deg)`; flipbook codepen
.flipbook { position: relative; width: 100%; height: 100%; transform-style: preserve-3d; transition: transform 0.5s; } .page-1 { background-color: #f0f0f0
.flipbook-container { width: 400px; /* Change based on your needs */ height: 300px; /* Change based on your needs */ perspective: 1000px; } { angle += 90