Featured img background spinner

<koken:if data="settings.show_feat_img" equals="true">
	<koken:featured_image>
		<header class="page_cover cover_drop_shadow">
			<koken:background lazy="true" id="cover_bg" style="height:100%;"></koken:background>
			<div id="ss_spinner"></div>
		</header>
	</koken:featured_image>
</koken:if>
<script>
$(document).on('k-lazy-loading-background', function(e) {
	$('#ss_spinner').addClass('loading');
});
$(document).on('k-lazy-background-loaded', function(e) {
	$('#ss_spinner').removeClass('loading');
});
</script>