In current browser implementations of CSS, you cannot divide by length types; calc(100vw / 5px) does...

This article provides information about the changes in Firefox 158 that affect developers. Firefox 158 was released on October 13, 2026.

NEW (nobody) in Core - CSS Parsing and Computation. Last updated 2026-09-24.

Elements in HTML have attributes; these are additional values that configure the elements or adjust their behavior in various ways to meet the criteria the users want.

Because I haven't published anything to it since August 31. And no one else has either. That's not a super long time to go silent but it is for a site that

Description Explainer: https://github.com/MicrosoftEdge/MSEdgeExplainers/blob/main/OpaqueRange/explainer.md The current Range interface methods do not support retrieving or creating ranges that rep...

Description Explainer: https://github.com/MicrosoftEdge/MSEdgeExplainers/blob/main/OpaqueRange/explainer.md The current Range interface methods do not support retrieving or creating ranges that rep...

Description This might not be the "normal" way to use Interop, but I think this is something that should be actively discussed as we talk about the 2027 focus areas... https://html.spec.whatwg.org/...