Block Themes: Avoid specificity bump for top-level element-only selectors

Prevent issues (e.g. links being underlined) caused by a bump in CSS
specificity for top-level element-only global element styles.

Backports the PHP changes from https://github.com/WordPress/gutenberg/pull/63403.

Fixes #61630.
Fixes #61660.
Props aaronrobertshaw, andrewserong, noisysocks.

Built from https://develop.svn.wordpress.org/trunk@58749


git-svn-id: http://core.svn.wordpress.org/trunk@58151 1a063a9b-81f0-0310-95a4-ce76da25c4cd
This commit is contained in:
noisysocks 2024-07-18 06:43:18 +00:00
parent 05c7351e53
commit a4e3fdfa3a
2 changed files with 17 additions and 2 deletions

View File

@ -2888,8 +2888,23 @@ class WP_Theme_JSON {
$declarations = static::update_separator_declarations( $declarations );
}
/*
* Top-level element styles using element-only specificity selectors should
* not get wrapped in `:root :where()` to maintain backwards compatibility.
*
* Pseudo classes, e.g. :hover, :focus etc., are a class-level selector so
* still need to be wrapped in `:root :where` to cap specificity for nested
* variations etc. Pseudo selectors won't match the ELEMENTS selector exactly.
*/
$element_only_selector = $current_element &&
isset( static::ELEMENTS[ $current_element ] ) &&
// buttons, captions etc. still need `:root :where()` as they are class based selectors.
! isset( static::__EXPERIMENTAL_ELEMENT_CLASS_NAMES[ $current_element ] ) &&
static::ELEMENTS[ $current_element ] === $selector;
// 2. Generate and append the rules that use the general selector.
$block_rules .= static::to_ruleset( ":root :where($selector)", $declarations );
$general_selector = $element_only_selector ? $selector : ":root :where($selector)";
$block_rules .= static::to_ruleset( $general_selector, $declarations );
// 3. Generate and append the rules that use the duotone selector.
if ( isset( $block_metadata['duotone'] ) && ! empty( $declarations_duotone ) ) {

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@ -16,7 +16,7 @@
*
* @global string $wp_version
*/
$wp_version = '6.7-alpha-58748';
$wp_version = '6.7-alpha-58749';
/**
* Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.