Performance Optimization Techniques

The 'content-visibility: auto' CSS property provides performance optimization by skipping the rendering of off-screen content. This modern CSS property tells the browser it can skip rendering work for elements that aren't currently visible in the viewport, including layout, painting, and other rendering operations. The browser still knows the approximate size of the content (when used with contain-intrinsic-size to provide size estimates), but it doesn't need to render the actual content until it comes into view. This can significantly improve initial page load performance and scrolling smoothness, especially for long pages with complex content. It's a powerful and simple way to achieve lazy rendering without JavaScript. While somewhat similar to virtual scrolling, it's easier to implement as it's a simple CSS property, though it has less explicit control and requires fallbacks for older browsers.