Gutenberg block development helper function to detect whether a block renders on the frontend or the backend

fk_is_front_end_query.php

<?php
/**
 * Hackish solution to distinguish between block renders on the front end, and the back end.
 *
 * In the admin, the global `$wp_query` does not contain a query. We use this to determine whether a rendering is
 * happening on the front end or the back end.
 *
 * @return bool Whether we're in the admin or on the front end.
 */
function fk_is_front_end_query() {
	return ! is_null( $GLOBALS['wp_query']->query );
}