Question:
Fix largest contentful paint issue in next js image

Summary: Largest Contentful Paint (LCP) is a core web vital metric that measures loading performance. To fix LCP issues in a Next.js application, particularly related to images, you can take several steps:


Optimize Images: Large images can significantly slow down loading times. Use image optimization techniques such as compressing images without sacrificing quality, resizing images to appropriate dimensions, and using modern image formats like WebP.


Lazy Loading: Implement lazy loading for images so that they are only loaded when they enter the viewport. Next.js provides a built-in Image component that supports lazy loading out of the box.


Responsive Images: Serve appropriately sized images based on the device's screen size and resolution. You can use the srcset attribute to provide different image sources for different screen resolutions.


Priority Loading: Prioritize loading of critical images above the fold to ensure that they are loaded first. This can be achieved using the priority attribute in Next.js' Image component or by strategically placing the images in your page's markup.


Solution:

<picture>

  <source media="(max-width:699px)" srcSet="https://res.cloudinary.com/di7j408eq/image/upload/v1685516535/outdoor-living-slider_1_nsnsnr.webp" type="image/webp" /> // for tab media size

  <source media="(max-width:640px)" srcSet="https://res.cloudinary.com/di7j408eq/image/upload/v1685516535/outdoor-living-slider_1_nsnsnr.webp" type="image/webp" /> // for mobile media size

  <Image

    src="https://res.cloudinary.com/di7j408eq/image/upload/v1685516535/outdoor-living-slider_1_nsnsnr.webp"

    width={500}

    height={500}

    alt="calgary landscaping"

    quality={100}

    priority="low"

    loading="lazy"

  />

</picture>


Answered by: >maulik

Credit:> StackOverflow


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