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`; const blob = new Blob([html], { type: 'text/html' }); const a = document.createElement('a'); a.href = URL.createObjectURL(blob); a.download = 'document.html'; a.click(); showToast('已导出 .html'); } function toggleFS() { if (!document.fullscreenElement) document.documentElement.requestFullscreen(); else document.exitFullscreen(); } function showToast(msg) { const t = document.getElementById('toast'); t.textContent = msg; t.classList.add('show'); setTimeout(() => t.classList.remove('show'), 2000); } init();