wp-includes/class-wp-duotone.php:851Enqueue a block CSS declaration for the page.
$filter_idstring$duotone_selectorstring$filter_valuestring private static function enqueue_block_css( $filter_id, $duotone_selector, $filter_value ) { // Build the CSS selectors to which the filter will be applied. $selectors = explode( ',', $duotone_selector ); $selectors_scoped = array(); foreach ( $selectors as $selector_part ) { /* * Assuming the selector part is a subclass selector (not a tag name) * so we can prepend the filter id class. If we want to support elements * such as `img` or namespaces, we'll need to add a case for that here. */ $selectors_scoped[] = '.' . $filter_id . trim( $selector_part ); } $selector = implode( ', ', $selectors_scoped ); self::$block_css_declarations[] = array( 'selector' => $selector, 'declarations' => array( 'filter' => $filter_value, ), ); }Introduced in 6.3.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/class-wp-duotone.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.