srcset and sizes: How the Browser Picks Images

Related: What loading="lazy" Does and Why Google Added It to the HTML Spec covers the other half of image loading behavior that pairs with responsive image selection. A user on a 375px iPhone with a 3x retina display viewing your site on 4G should get a different image file than a user on a 1440px desktop with a 1x monitor on a slow hotel WiFi connection. These two users have completely different needs: one wants a sharp image at a small size, the other wants a smaller file at a large size. With