CSS
The four CSS properties that trigger layout
Animate the wrong property and every frame re-measures the page. Animate the right one and the compositor handles it alone.
Painter
CSS
Writing a design system that survives its second year
Year one is components. Year two is everything the components could not predict, which is where systems die.
Deep dives
Reading a flame graph like a profiler would
Width is time and depth is the call stack. Once those two facts land, most of a trace reads itself.
CSS
content-visibility, measured on a real page
One property that tells the browser to skip work for anything off screen. The numbers are good, and the caveats are real.
CSS
Dark mode without doubling your stylesheet
If dark mode doubled your CSS, the problem was never dark mode. It was that your colours were never tokens.
Performance
INP is not FID with a new name
FID measured the first interaction. INP measures the worst one, and that is a completely different bar to clear.
Performance
The image formats worth the conversion cost
AVIF is smaller, slower to encode, and not always the right answer. Here is where each format earns its place.
Performance
Third-party scripts: an audit that takes an hour
List every tag, name its owner, and delete the two nobody can account for. That is the whole method.