document.addEventListener("DOMContentLoaded",()=>{ const sliders=document.querySelectorAll('.swiper'); sliders.forEach(slider=>{ if('IntersectionObserver' in window){ new IntersectionObserver((entries,observer)=>{ entries.forEach(e=>{ if(e.isIntersecting){ slider.classList.add('swiper-initialized'); observer.unobserve(slider); } }); }).observe(slider); }else slider.classList.add('swiper-initialized'); }); });