`); printWindow.document.close(); printWindow.focus(); setTimeout(() => { printWindow.print(); printWindow.close(); }, 500); });// Download PDF downloadPdfBtn.addEventListener('click', async () => { const { jsPDF } = window.jspdf; const doc = new jsPDF({ orientation: 'portrait', unit: 'mm' }); const element = invoicePreview; const options = { background: 'white', scale: 2 }; const canvas = await html2canvas(element, options); const imgData = canvas.toDataURL('image/png'); const imgWidth = 210; const pageHeight = 295; const imgHeight = canvas.height * imgWidth / canvas.width; let heightLeft = imgHeight; let position = 0; doc.addImage(imgData, 'PNG', 0, position, imgWidth, imgHeight); heightLeft -= pageHeight; while (heightLeft >= 0) { position = heightLeft - imgHeight; doc.addPage(); doc.addImage(imgData, 'PNG', 0, position, imgWidth, imgHeight); heightLeft -= pageHeight; } doc.save(`invoice_${document.getElementById('invoiceNumber').value}.pdf`); });// Send Email (mock function) sendEmailBtn.addEventListener('click', () => { const clientEmail = document.getElementById('clientEmail').value; if (!clientEmail) { alert('Please enter client email address'); return; } alert(`Invoice will be sent to ${clientEmail}`); previewModal.classList.add('hidden'); });// Generate Invoice generateBtn.addEventListener('click', () => { if (items.length === 0) { alert('Please add at least one item to the invoice'); return; } generateInvoicePreview(); previewModal.classList.remove('hidden'); });// Save Draft (mock function) saveDraftBtn.addEventListener('click', () => { alert('Draft saved successfully!'); });// Signature Upload uploadSignatureBtn.addEventListener('click', (e) => { e.preventDefault(); signatureUpload.click(); });signatureUpload.addEventListener('change', (e) => { const file = e.target.files[0]; if (file) { const reader = new FileReader(); reader.onload = (event) => { signaturePreview.src = event.target.result; signaturePreview.classList.remove('hidden'); uploadSignatureBtn.classList.add('hidden'); }; reader.readAsDataURL(file); } });// Auto-select GST Invoice in content slider const gstInvoiceLink = document.querySelector('a[href="https://smalltoolhub.com/gst-invoice-generator/"]'); if (gstInvoiceLink) { gstInvoiceLink.classList.add('active'); gstInvoiceLink.scrollIntoView({ behavior: 'smooth', inline: 'center' }); }// Slider Touch Support for Content Type Slider let isDraggingContent = false; let startXContent, scrollLeftContent; const contentSlider = document.querySelector('.slider-container');contentSlider.addEventListener('touchstart', (e) => { isDraggingContent = true; startXContent = e.touches[0].pageX - contentSlider.offsetLeft; scrollLeftContent = contentSlider.scrollLeft; });contentSlider.addEventListener('touchend', () => { isDraggingContent = false; });contentSlider.addEventListener('touchmove', (e) => { if (!isDraggingContent) return; e.preventDefault(); const x = e.touches[0].pageX - contentSlider.offsetLeft; const walk = (x - startXContent) * 2; contentSlider.scrollLeft = scrollLeftContent - walk; });// Initialize the app loadClients(); loadCompanies(); loadCompanyDetails(); calculateTotals(); });