wp-includes/class-wp-dependencies.php:476Query the list for an item.
$handlestring$statusstringoptional'registered'bool|_WP_Dependency public function query( $handle, $status = 'registered' ) { switch ( $status ) { case 'registered': case 'scripts': // Back compat. return $this->registered[ $handle ] ?? false; case 'enqueued': case 'queue': // Back compat. if ( in_array( $handle, $this->queue, true ) ) { return true; } return $this->recurse_deps( $this->queue, $handle ); case 'to_do': case 'to_print': // Back compat. return in_array( $handle, $this->to_do, true ); case 'done': case 'printed': // Back compat. return in_array( $handle, $this->done, true ); } return false; }Introduced in 2.1.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/class-wp-dependencies.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.