function getDaysInMonth(year, month) {
return new Date(year, month, 0).getDate();
}
const date = new Date();
const currentYear = date.getFullYear();
const currentMonth = date.getMonth() + 1; // 👈️ months are 0-based
// 👇️ Current Month
const daysInCurrentMonth = getDaysInMonth(currentYear, currentMonth);
console.log(daysInCurrentMonth);
// 👇️ Other Months
const daysInJanuary = getDaysInMonth(2025, 1);
console.log(daysInJanuary); // 👉️ 31
const daysInSeptember = getDaysInMonth(2025, 9);
console.log(daysInSeptember); // 👉️ 30
Reference:
