Apple doesn't support AVIF in Safari because macOS/iOS don't support the image format and I understand their approach.
Topic: Performance
A
pictureelement snippet to load properly resized responsive webp images in browsers that support them.slowfil.es is a service to evaluate if slow JavaScript/CSS files affect page performance.
The new
content-visibilityCSS property explained by Surma and Jake.A look-back at caching strategies from the past; with recent changes in Chrome's and Safari's caching strategies, there is no caching benefit from using publicly available third-party libraries anymore.