Code-Snippets-Functions/Execute a function on a child site/Smush/skip-preloader-image-urls-lazy-loading.txt

add_filter('smush_skip_image_from_lazy_load', function( $skip, $src, $image ){
	//compare the $src here and return true to skip
	return $skip || strpos( $src, '/preloader.png' );
}, 99, 3);