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bram.us

A rather geeky/technical weblog, est. 2001, by Bramus

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Detecting at-rule support in CSS with @supports at-rule(@keyword)

Bram.us
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Introducing view-transitions-mock: A non-visual Polyfill for Same-Document View Transitions

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Animating CSS position-area with View Transitions

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Anchors Aweigh! (2026.02.26 @ State of the Browser)

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Chrome 145 adds Experimental Support for Vertical Tabs

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Using 100vw is now scrollbar-aware (in Chrome 145+, under the right conditions)

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How to Find the public WebKit Bug using the Internal Apple rdar:// Bug ID

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CSS Wrapped 2025

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Anchor Positioning and the Inset-Modified Containing Block (IMCB)

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Use overscroll-behavior: contain to prevent a page from scrolling while a <​dialog> is open

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Señors @ Scale: Modern CSS at Scale with Bramus

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Anchor Positioning is transform-aware in Chrome 144+

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Faking Two-Phase View Transitions with the Navigation API’s precommitHandler

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Animating CSS width or height no longer force a Main Thread animation (in Chrome, under the right conditions)

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Recording of [the demo](https://codepen.io/bramus/pen/YPwbNMK?editors=1100), recorded in Google Chrome\.

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Solved by CSS Scroll State Queries: hide a header when scrolling down, show it again when scrolling up.

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CSS @starting-style debugging is available in Chrome DevTools!

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View Transitions Feature Explorer

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![](https://www.bram.us/wordpress/wp-content/uploads/2025/10/TCP-Libsyn-Profile_Generic-560x560.jpg)

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What’s New in View Transitions (2025 Update)

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