style> .slider-viewport { overflow: hidden; width: 100%; } #banner-slider { display: flex; transition: transform 0.8s ease; } #banner-slider .slide { box-sizing: border-box; } script> document.addEventListener('DOMContentLoaded', function () { const viewport = document.querySelector('.slider-viewport'); const slider = document.getElementById('banner-slider'); const btnPrev = document.getElementById('prevBtn'); const btnNext = document.getElementById('nextBtn'); // Only include direct children with class 'slide' const slides = Array.from(slider.children).filter(el => el.classList.contains('slide')); const count = slides.length; let idx = 0; let autoplay; let isVisible = false; // Size slider & slides slider.style.width = (count * 100) + '%'; slides.forEach(s => s.style.flex = '0 0 ' + (100 / count) + '%'); function go(n) { slider.style.transform = 'translateX(-' + (n * (100 / count)) + '%)'; } function showPrev() { idx = idx > 0 ? idx - 1 : count - 1; go(idx); } function showNext() { idx = idx < count - 1 ? idx + 1 : 0; go(idx); } // Button bindings if (btnPrev) btnPrev.addEventListener('click', e => { e.preventDefault(); showPrev(); resetAutoplay(); }); if (btnNext) btnNext.addEventListener('click', e => { e.preventDefault(); showNext(); resetAutoplay(); }); function startAutoplay() { if (!autoplay) autoplay = setInterval(showNext, 5000); } function stopAutoplay() { clearInterval(autoplay); autoplay = null; } function resetAutoplay() { stopAutoplay(); startAutoplay(); } // Pause/resume on hover viewport.addEventListener('mouseenter', stopAutoplay); viewport.addEventListener('mouseleave', () => { if (isVisible) startAutoplay(); }); // Observer to track visibility const obs = new IntersectionObserver(entries => { entries.forEach(entry => { if (entry.target !== viewport) return; if (entry.isIntersecting) { isVisible = true; startAutoplay(); } else { isVisible = false; stopAutoplay(); } }); }, { threshold: 0.5 }); obs.observe(viewport); // Initial state go(0); });