Lazy loading is a technique that improves page performance by delaying the loading of images until they are actually visible to the user. With the IntersectionObserver API, your web application can monitor when an image scrolls into the viewport. Once an image is about to appear on the screen, the application can then load it, rather than loading all images at once when the page initially loads. This approach reduces the initial load time and conserves bandwidth, ensuring a smoother user experience.
Key strategies include optimizing images (compress, use WebP), minifying CSS/JS, leveraging both browser and server caching with a CDN, implementing lazy loading for offscreen elements, and ensuring efficient server response times to handle high traffic.
