Harry Roberts published a nice deep dive into web perf metrics and why DomContentLoaded can be a valuable metrics to keep an eye on.
Topic: Performance
A summary of ongoing spec discussions regarding container based image loading.
The Resource Timing API received an update and will soon include a
renderBlockingStatusfield to find render-blocking resources.Apple doesn't support AVIF in Safari because macOS/iOS don't support the image format and I understand their approach.
A
pictureelement snippet to load properly resized responsive webp images in browsers that support them.