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`; const blob = new Blob([html], { type: 'text/html' }); const url = URL.createObjectURL(blob); const a = document.createElement('a'); a.href = url; a.download = 'markdown-export.html'; a.click(); URL.revokeObjectURL(url); showToast('HTML file downloaded!'); } // IntersectionObserver const obs = new IntersectionObserver(entries => { entries.forEach(e => { if (e.isIntersecting) { e.target.classList.add('visible'); obs.unobserve(e.target) } }) }, { threshold: .15 }); document.querySelectorAll('.fade-in').forEach(el => obs.observe(el)); // Initial render render();