需要计算加入日期与今天日期的天数差，格式为年、月、日

// 获取当前日期
const today = new Date();
const currentYear = today.getFullYear();
const currentMonth = today.getMonth() + 1; // 月份从0开始，需要加1
const currentDay = today.getDate();

// 获取加入日期（示例为2022年1月1日）
const joinYear = 2022;
const joinMonth = 1;
const joinDay = 1;

// 将当前日期和加入日期转换为日期对象
const currentDate = new Date(currentYear, currentMonth - 1, currentDay);
const joinDate = new Date(joinYear, joinMonth - 1, joinDay);

// 计算天数差
const timeDiff = Math.abs(currentDate - joinDate);
const daysDiff = Math.ceil(timeDiff / (1000 * 60 * 60 * 24));

// 格式化输出
const yearsDiff = Math.floor(daysDiff / 365);
const monthsDiff = Math.floor((daysDiff % 365) / 30);
const remainingDays = daysDiff % 30;

console.log(`加入日期与今天日期的天数差为：${yearsDiff}年${monthsDiff}月${remainingDays}天`);