Loading GIF Transparent Material Design: A Guide to Optimizing Core Web Vitals

As developers, we're always looking for ways to improve the quality of our websites and provide a better user experience for our visitors. One powerful tool in our arsenal is Lighthouse, an open-source, automated tool that helps us identify opportunities to optimize our web pages. In this guide, we'll explore how Lighthouse can help us improve our Core Web Vitals, with a focus on optimizing images.

The Impact of Images on User Experience and Core Web Vitals

Images are a crucial part of any website, but they can also have a significant impact on the user experience and Core Web Vitals. The Largest Contentful Paint (LCP) metric measures the time it takes for the main content of a page to load, and images are often the largest and most prominent elements on a page.

Optimizing Images with Lighthouse

Lighthouse provides several tips for optimizing images, including:

* Avoiding images that cause network contention with other critical resources like CSS and JS

* Using CSS aspect-ratio or aspect ratio boxes to reserve space otherwise

* Setting dimensions (width, height) on your images

* Lazy-loading offscreen images to reduce network contention for key resources

* Avoiding wasting pixels by compressing and not serving overly high DPI images

* Using srcset + efficient modern image formats

By following these tips, we can significantly improve the performance of our images and improve the user experience.

Modern Image Components

Modern image components like Next.js (for React) and Nuxt image (for Vue) try to bake in as many of these concepts as possible by default. While not render-blocking, they can indirectly impact render performance. It's essential to be aware of these components and how they can affect our images.

In conclusion, optimizing images is a crucial part of improving the user experience and Core Web Vitals. By using Lighthouse and following the tips provided, we can significantly improve the performance of our images and provide a better experience for our visitors. Whether you're using 11ty for your static sites or doing it manually, these techniques will help you get started on optimizing your images.

References

* Chrome DevTools

* Lighthouse

* Core Web Vitals

* Stack Overflow blog

* Next.js

* Nuxt image

Loading gif transparent material design