CSS
Your CSS Header Is Sticky. Which Box Is It Sticking To?
A wrapper that hides horizontal overflow can make a sticky header scroll away. Check both computed axes to find which box owns the scrollport.
CSS
Flexbox Won’t Shrink? Check the Wrapper’s Minimum Size
When flex-shrink and ellipsis leave a row overflowing, find the flex item that owns the minimum size and fix the wrapper without clipping the whole card.
Performance
The Stylesheet That Blocked the Render for Two Seconds
One render-blocking sheet on a third-party font service held the first paint, and the page had no content to show while the browser waited on CSS it barely…