`; await new Promise(resolve => setTimeout(resolve, 100)); // 2. Use html2canvas to capture the content try { const canvas = await html2canvas(pdfExportContent, { scale: 2, // A scale of 2 provides good quality without a huge file size useCORS: true, logging: false }); const imgData = canvas.toDataURL('image/png'); // **FIX**: Create a standard A4 PDF and scale the image to fit within its margins. // This prevents content from being cut off at the page edges. const pdf = new jsPDF({ orientation: "portrait", unit: "pt", // Use points for standard PDF sizing format: "a4" }); const pageWidth = pdf.internal.pageSize.getWidth(); const pageHeight = pdf.internal.pageSize.getHeight(); const margin = 40; // 40pt margin on each side const imageWidth = canvas.width; const imageHeight = canvas.height; const aspectRatio = imageWidth / imageHeight; // Calculate the width and height of the image on the PDF to fit the page let pdfImageWidth = pageWidth - (margin * 2); let pdfImageHeight = pdfImageWidth / aspectRatio; // If the scaled height is still too big for the page, you might need multi-page logic. // For this tool, we assume it will fit on one page. if (pdfImageHeight > pageHeight - (margin * 2)) { pdfImageHeight = pageHeight - (margin * 2); pdfImageWidth = pdfImageHeight * aspectRatio; } const x = (pageWidth - pdfImageWidth) / 2; // Center the image pdf.addImage(imgData, 'PNG', x, margin, pdfImageWidth, pdfImageHeight); pdf.save(`Sugar-Intake-Report-${new Date().toISOString().slice(0,10)}.pdf`); } catch (error) { console.error("Error generating PDF:", error); alert("Sorry, there was an error creating the PDF. Please check your browser console for details and try again."); } finally { // 4. Clean up pdfLoader.classList.add('hidden'); pdfDownloadBtn.disabled = false; pdfExportContent.innerHTML = ''; // Clear the content after generation } } // --- START THE APP --- initialize(); });