A picture element snippet to load properly resized responsive webp images in browsers that support them.
Topic: Performance
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.
Improve the loading of your responsive images by using link rel="preload" elements with the new attributes imagesrcset and imagesizes.