A rather geeky/technical weblog, est. 2001, by Bramus
position-area with View Transitions
CSS Anchor Positioning is a powerful tool, but one of the things that you cannot do natively (yet) is animating the position-area property. This blog post introduces a technique to animate position-area changes using View Transitions.
100vw is now scrollbar-aware (in Chrome 145+, under the right conditions)
From Chrome 145 onwards, 100vw will automatically subtract the size of the (vertical) scrollbar from it if you have forced the html element to always show a vertical scrollbar (using overflow[-y]: scroll) or if you reserve space for it (using scrollbar-gutter: stable). The same applies to vh with a horizontal scrollbar, as well as all small, large, and dynamic variants.
Once again, it has been an AMAZING year for CSS and UI. To celebrate this, we – the Chrome CSS/UI DevRel Team – created another edition of CSS Wrapped!
As an experiment to see if Modern CSS is up to the task, I recreated the Google Antigravity website with Modern CSS.
If you kinda understand Anchor Positioning, but it still surprises you from time to time, then most likely this is the missing piece of information: the Inset-Modified Containing Block (or IMCB for short).
overscroll-behavior: contain to prevent a page from scrolling while a <dialog> is open
Chrome 144 features a small change to overscroll-behavior: it now also works on non-scrollable scroll containers. While this change might seem trivial, it fixes an issue developers have been dealing with for ages: prevent a page from scrolling while a (modal) <dialog> is open.
A while ago I joined Dan Neciu – whom I met at Frontmania in 2023 – on his “Señors @ Scale” podcast. We talked about all things CSS.
Starting with Chrome 144, Anchor Positioning is going to be transform-aware. From then on, anchoring will resolve against the bounding box of the transformed ancho