Disable scrolling ability ?

Thanks, but I already tried, I want it to close when all items on the page have done loading :

current code for one filter :

//searches after typing in the search text input
export function shape18_click(event, $w) {
	let filter = wixData.filter();
	//shows loading screen while loading data
		 $w('#loader').show();
	if ($w("#checkbox1").checked)
 	{
    	filter=filter.ne("dispo", true);
	}
	filter = filter
		.contains("title", $w("#searchInput").value)
		.contains("categorie", $w("#categorieInput").value)
		.contains("vendeur", $w("#vendeurInput").value)
		.contains("type", $w("#typeRadio").value);
	$w("#dynamicDataset").setFilter(filter)
	//hides loading screen after data was retrieved
	 .then( () => {       
            $w('#loader').hide();
     });
}

and what’s Dataobj ?