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Bram.us0 Hot0 comments7 min read
Feature Detecting “Undetectable” CSS Features with @supports named-feature()
CSS gained a new @supports named-feature() function to detect implementation-specific behaviors that traditional @supports checks cannot catch, such as partial feature support or the interaction between two properties. The classic example is 'Flexbox gap', where browsers could not distinguish gap working with Grid versus Flex layouts. The CSS Working Group adopted David Baron's proposal, and two keywords now exist: anchor-position-follows-transforms (supported in Chrome 150, Firefox 156, Safari Technology Preview) and single-axis-scroll-container (supported in Chrome 153, not yet in Firefox or Safari). The author proposed both keywords and worked directly with the Safari team to get support merged.
Source: https://www.bram.us/2026/08/27/feature-detecting-undetectable-css-features-with-supports-named-feature. 8 Sync News only summarizes and links out; content copyright belongs to the authors and original sources.
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