Problem Statement
What are advanced image optimization strategies in Next.js and how do you implement them?
Explanation
Implement advanced image optimization by using the priority prop for above-the-fold images to prevent lazy loading and improve LCP, specifying sizes prop to tell the browser how wide the image will be at different breakpoints for responsive images ensuring correct sizes are loaded.
Use placeholder with blurDataURL for smooth loading transitions that improve perceived performance, configure custom loader for external image hosts like Cloudinary or Imgix to leverage their optimization features, and use the fill prop with object-fit for responsive images that fill their container.
Consider using multiple image formats by configuring image formats in next.config.js, implementing art direction with picture element for different image crops at different sizes, lazy loading images below the fold automatically, and using quality prop strategically where 75 is default but you can lower for decorative images or increase for hero images.
Monitor image performance with Lighthouse and Core Web Vitals, and ensure proper image sizing to avoid sending unnecessarily large images to mobile devices.