生成可读的日期函数，带有可选的日期差异

Posted 2021-02-25

function adate(daysFromNow) {
  var date, datestr, mm, dd;
 
  datestr = new Date().getTime();
 
  if (!!daysFromNow) {
    datestr += (1000 * 60 * 60 * 24 * daysFromNow);
  }
 
  date = new Date(datestr);
 
  mm = date.getMonth() + '';
  if (mm.length == 1) {
    mm = '0' + mm;
  }
 
  dd = date.getDate() + '';
  if (dd.length == 1) {
    dd = '0' + dd;
  }
 
  return date.getFullYear() + '-' + 
         mm +  '-' + dd;
}