<script> $(document).ready(function() { // Register the ScrollTrigger plugin gsap.registerPlugin(ScrollTrigger); // Target elements with .gastgeber-fade $('.gastgeber-fade').each(function() { let $this = $(this); ScrollTrigger.create({ trigger: $this, start: 'top 80%', // when top of element hits 80% of viewport height once: true, // only trigger once onEnter: function() { $this.addClass('active'); } }); }); }); </script>