https://www.easyinvesto.de/wp-content/plugins/twin-elements/modules/lightbox/assets/main.js?ver=201802201721

1(function(){
2	var lightboxes = document.querySelectorAll( '.temslbx-lightbox' );
3	if ( 0 == lightboxes.length ) { return; }
4	
5	var lightboxCount = lightboxes.length;
6	
7	for ( var i = 0; i != lightboxCount; ++i ) {
8		var lightbox = lightboxes[ i ];
9		if ( !lightbox.dataset[ 'id' ] ) { continue; }
10		
11		/* Lightbox triggers */
12		var triggers = document.querySelectorAll( '[data-temslbx-id="' + lightbox.dataset[ 'id' ] + '"]' );
13		if ( 0 == triggers.length ) { continue; }
14		
15		var triggerCount = triggers.length;
16		
17		/* Lightbox closing */
18		lightbox.addEventListener( 'click', function( e ) {
19			if ( e.currentTarget == e.target || ~e.target.className.indexOf( 'lightbox-close-button' )) {
20				this.className = this.className.replace( ' on', '' );
21				var l = this;
22				setTimeout( function() {
23					l.className = l.className.replace( ' active', '' );
24				}, 250 );
25			}
26		});
27		
28		/* Lightbox triggers' events */
29		for ( var j = 0; j != triggerCount; ++j ) {
30			var trigger = triggers[ j ];
31			trigger.addEventListener( 'click', function( e ) {
32				e.preventDefault();
33				
34				var targetLightboxID = this.dataset[ 'temslbxId' ];
35				if ( !targetLightboxID ) { return; }
36				
37				var targetLightbox;
38				
39				/* Toggle lightboxes' states */
40				for ( var i = 0; i != lightboxCount; ++i ) {
41					var l = lightboxes[ i ];
42					var id = l.dataset[ 'id' ] ? l.dataset[ 'id' ] : false;
43					
44					l.className = l.className.replace( ' active', '' );
45					l.className = l.className.replace( ' on', '' );
46					
47					if ( targetLightboxID == id ) {
48						targetLightbox = l;
49						l.className += ' active';
50						setTimeout( function() {
51							targetLightbox.className += ' on';
52						}, 1 );
53					}
54				}
55			});
56		}
57	}
58})();