let currentDate = new Date();
// 获取当前年份
let currentYear = currentDate.getFullYear();
// 获取当前月份(注意:返回结果是从0开始计算的,所以需要加1)
let currentMonth = currentDate.getMonth() + 1;
// 获取当前日期
let currentDay = currentDate.getDate();
//获取当前年月日
let nowYearDate = new Date(currentYear, currentMonth-1, currentDay);
// 获取当前日期的前一年
let lastYearDate = new Date(currentYear - 1, currentMonth - 1, currentDay);