JS 根据今天的日期获取本周星期一与星期天的日期

var now = new Date(); 

var nowTime = now.getTime() ; 

var day = now.getDay();

var oneDayLong = 24*60*60*1000 ; 

var MondayTime = nowTime - (day-1)*oneDayLong  ; 

var SundayTime =  nowTime + (7-day)*oneDayLong ; 

var monday = new Date(MondayTime);

var sunday = new Date(SundayTime);

console.log(monday) ; 

console.log(sunday) ;