Sub-Subsection4

Sub-Subsection4

Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum.



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    document.addEventListener("DOMContentLoaded", function () { /* -------- Date Helpers -------- */ function addDays(date, days) { const d = new Date(date); d.setDate(d.getDate() + days); return d; } function isWorkingDay(date) { const day = date.getDay(); // 0=Sun, 6=Sat return day !== 0 && day !== 6; // Mon-Fri only } function addWorkingDays(startDate, days) { let current = new Date(startDate); let remaining = days; while (remaining > 0) { current = addDays(current, 1); if (isWorkingDay(current)) { remaining--; } } return current; } function formatDate(date) { return date.toISOString().split('T')[0]; // YYYY-MM-DD } /* -------- DOM Wiring -------- */ const calcButton = document.getElementById("calcBtn"); const daysInput = document.getElementById("daysInput"); const typeContainer = document.getElementById("typeContainer"); const dayTypeSelect = document.getElementById("dayType"); const resultDiv = document.getElementById("result"); if (!calcButton || !daysInput || !typeContainer || !dayTypeSelect || !resultDiv) { console.error("Required DOM elements missing"); return; } let enteredDays = 0; calcButton.addEventListener("click", function () { enteredDays = parseInt(daysInput.value, 10); if (!Number.isInteger(enteredDays) || enteredDays < 0) { resultDiv.textContent = "Please enter a valid non-negative integer."; resultDiv.style.color = "red"; return; } typeContainer.style.display = "block"; dayTypeSelect.value = ""; resultDiv.textContent = ""; }); dayTypeSelect.addEventListener("change", function () { if (enteredDays === 0) return; const today = new Date(); let resultDate; if (dayTypeSelect.value === "working") { resultDate = addWorkingDays(today, enteredDays); } else { resultDate = addDays(today, enteredDays); } const formatted = formatDate(resultDate); resultDiv.textContent = `Result date: ${formatted}`; resultDiv.style.color = "green"; // Reset enteredDays = 0; typeContainer.style.display = "none"; dayTypeSelect.value = ""; daysInput.value = ""; }); });