js date获取天数差

function getDaysDifference(date1, date2) {
    // 创建Date对象
    const startDate = new Date(date1);
    const endDate = new Date(date2);

    // 获取时间戳（毫秒）
    const startTimestamp = startDate.getTime();
    const endTimestamp = endDate.getTime();

    // 计算时间戳差值（毫秒）
    const differenceInMilliseconds = Math.abs(endTimestamp - startTimestamp);

    // 将毫秒转换为天数
    const millisecondsPerDay = 24 * 60 * 60 * 1000;
    const differenceInDays = Math.floor(differenceInMilliseconds / millisecondsPerDay);

    return differenceInDays;
}

// 示例使用
const date1 = '2023-10-01';
const date2 = '2023-10-10';
console.log(getDaysDifference(date1, date2)); // 输出: 9