Initial Investment: ${outputInitialInvestment.textContent}

Discount Rate: ${outputDiscountRate.textContent}

Number of Periods: ${outputNumberOfPeriods.textContent}

Cash Flows

${cashFlowDetails}

Calculation Results

Metric	Value
Initial Investment	${outputInitialInvestment.textContent}
Discount Rate	${outputDiscountRate.textContent}
Number of Periods	${outputNumberOfPeriods.textContent}
Total Cash Inflows (Present Value)	${outputTotalPresentValue.textContent}
Net Present Value (NPV)	${outputNPV.textContent}
Decision	${outputDecision.textContent}

`; element.innerHTML = pdfContent; html2pdf().from(element).set({ margin: [10, 10, 10, 10], filename: 'NPV_Calculator_Report.pdf', image: { type: 'jpeg', quality: 0.98 }, html2canvas: { scale: 2, logging: true, dpi: 192, letterRendering: true }, jsPDF: { unit: 'mm', format: 'a4', orientation: 'portrait' } }).save(); } // Event Listeners for Tabs tabButtons.forEach((button, index) => { button.addEventListener('click', function() { // Prevent direct tab switching to 'Results' without calculation if (index === 2 && currentActiveTab !== 1) { alert('Please calculate NPV first.'); return; } switchTab(index); }); }); // Navigation Button Listeners if (nextTab1Button) { nextTab1Button.addEventListener('click', function() { const numPeriodsVal = parseInt(numberOfPeriodsInput.value); if (isNaN(numPeriodsVal) || numPeriodsVal <= 0) { alert('Please enter a valid positive integer for Number of Periods before proceeding.'); numberOfPeriodsInput.focus(); return; } setupCashFlowInputs(); switchTab(1); }); } else { console.error("Next tab 1 button not found."); } if (prevTab2Button) { prevTab2Button.addEventListener('click', function() { switchTab(0); }); } else { console.error("Prev tab 2 button not found."); } if (nextTab2Button) { nextTab2Button.addEventListener('click', calculateNPV); } else { console.error("Next tab 2 button not found."); } if (prevTab3Button) { prevTab3Button.addEventListener('click', function() { switchTab(1); }); } else { console.error("Prev tab 3 button not found."); } if (addCashFlowButton) { addCashFlowButton.addEventListener('click', function() { const existingCashFlows = cashFlowInputsContainer.querySelectorAll('.cash-flow-item').length; const numPeriods = parseInt(numberOfPeriodsInput.value); if (isNaN(numPeriods) || numPeriods <= 0) { alert('Please enter a valid positive integer for Number of Periods on the "Project Details" tab first.'); switchTab(0); numberOfPeriodsInput.focus(); return; } // Allow adding more periods than initially specified if needed, but update the number of periods input if (existingCashFlows < numPeriods) { // Only add up to the initially defined number of periods setupCashFlowInputs(); // Regenerate based on current numPeriods } else { const newPeriodIndex = existingCashFlows + 1; const cashFlowItem = document.createElement('div'); cashFlowItem.className = 'cash-flow-item'; cashFlowItem.innerHTML = ` Cash Flow Year ${newPeriodIndex} ($): `; cashFlowInputsContainer.appendChild(cashFlowItem); // Update the number of periods input field to reflect the new total numberOfPeriodsInput.value = newPeriodIndex; } }); } else { console.error("Add Cash Flow button not found."); } if (downloadPdfButton) { downloadPdfButton.addEventListener('click', downloadPDF); } else { console.error("Download PDF button not found."); } });