前端JS获取当前一周（上一周、下一周、上几周、下几周）的时间

//获取当前一周时间的初始定义
var now = new Date();
//获取下一周时间的初始定义
var today = new Date();
var now = new Date(today.getFullYear(), today.getMonth(), today.getDate() + 7);

var weekDay = ['周一', '周二', '周三', '周四', '周五', '周六', '周日'];
// 获取本周的第一天（周一）
var firstDay = new Date(now.setDate(now.getDate() - now.getDay() + (now.getDay() === 0 ? -6 : 1)));
// 存储本周的日期
var weekDates = [];
// 循环获取本周的所有日期
for (var i = 0; i < 7; i++) {
    var tempDate = new Date(firstDay);
    tempDate.setDate(firstDay.getDate() + i);
    var year = tempDate.getFullYear();
    var month = tempDate.getMonth() + 1;
    var day = tempDate.getDate();
    weekDates.push({
        week: weekDay[i],
        date: year + '-' + (month < 10 ? '0' : '') + month + '-' + (day < 10 ? '0' : '') + day
    });
}
console.log(weekDates)