( function( $ ) {
	function loadData() {
		return new Promise(( resolve, reject ) => {
		  setTimeout(resolve, 500);
		})
	  }

	  loadData()
		.then(() => {
		  let preloaderEl = document.getElementById( 'preloader' );
		  preloaderEl.classList.add( 'preloader-hidden' );
		  preloaderEl.classList.remove( 'preloader-vissible' );
		});
})( jQuery );