wp-admin/includes/class-wp-site-health.php:2909Adds a class to the body HTML tag.
$body_classstringstring public function admin_body_class( $body_class ) { $screen = get_current_screen(); if ( 'site-health' !== $screen->id ) { return $body_class; } $body_class .= ' site-health'; return $body_class; }Introduced in 5.2.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-admin/includes/class-wp-site-health.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.