Closed (fixed)
Project:
Drupal core
Version:
11.3.x-dev
Component:
CSS
Priority:
Critical
Category:
Task
Assigned:
Unassigned
Reporter:
Created:
1 Nov 2025 at 17:28 UTC
Updated:
18 Nov 2025 at 05:49 UTC
Jump to comment: Most recent
Our browserslist-db is out of date, let's upgrade it and rebuild CSS for all currently supported browser versions.
Start within a Git clone of the project using the version control instructions.
Or, if you do not have SSH keys set up on git.drupalcode.org:
Comments
Comment #3
longwaveSince December 2023, CSS can use the
&selector for nesting. This should be fine for all browsers we support:https://developer.mozilla.org/en-US/docs/Web/CSS/Nesting_selector#browse...
This means the built CSS is easier to read, but has a lot of changes.
Wondering how much PostCSS we are actually using any more given this is in effect...
Comment #4
longwaveThis has shaved 3344 bytes (about 9%) off the CSS byte count for the navigation performance test.
Comment #6
quietone commentedI was reviewing this and there was another update.
Comment #7
longwaveThanks. Not sure what was going on with the performance tests earlier, but it seems only the StylesheetBytes needs tweaking.
Comment #8
larowlanI confirmed all the edited css files are just generated with this script
Which printed nothing 👌
Committed to 11.x, backported to 11.3