通过月份获取当月开始日期和结束日期

//time为 202108 格式

 

getNearMonth(time){

    if(time != null && time != '' " ){

      var nyYear=time.slice(0,4);

      var nyMonth=time.slice(4,time.length);

      var firstDay = new Date(nyYear,nyMonth-1);

      var lastDay = new Date(new Date(nyYear,nyMonth).valueOf()-60*60*1000*24);

      function datasFormat(d){

          var datetime=d.getFullYear() + '-' + (d.getMonth() + 1) + '-' + d.getDate();

          return datetime;

          console.log(datetime,777)

      }

      var firstDay = datasFormat(firstDay)

      var lastDay = datasFormat(lastDay)

      console.log(firstDay ,lastDay ,111)

    }

  },