Change record status: 
Project: 
Introduced in branch: 
10.4.x, 11.1.x
Introduced in version: 
10.4.0, 11.1.0
Description: 

The :focus-within pseudo-class is help to an element if it or any of its descendants (children) have focus rather than :focus.

The following changes applied to the following core files,

  • In System module core/modules/system/css/components/hidden.module.css
  • In Stable9 theme core/themes/stable9/css/system/components/hidden.module.css

User Interface Impact
No changes will be visible in the user interface as existing styles will continue to function without disruption. But it reflects the accessibility of reading.

Impacts: 
Module developers
Themers