JS代码片段：一个日期离现在多久了

var dateDiff = function(hisTime,nowTime){    if(!arguments.length) return ‘‘;    var arg = arguments,            now =arg[1]?arg[1]:new Date().getTime(),            diffValue = now - arg[0].getTime(),            result={                isToday:false            },            minute = 1000 * 60,            hour = minute * 60,            day = hour * 24,            halfamonth = day * 15,            month = day * 30,            year = month * 12,

            _year = diffValue/year,            _month =diffValue/month,            _week =diffValue/(7*day),            _day =diffValue/day,            _hour =diffValue/hour,            _min =diffValue/minute;

    if(new Date().toDateString()==hisTime.toDateString()){        result.isToday=true;    }    if(_year>=1) result.text=parseInt(_year) + "年前";    else if(_month>=1) result.text=parseInt(_month) + "个月前";    else if(_week>=1) result.text=parseInt(_week) + "周前";    else if(_day>=1) result.text=parseInt(_day) +"天前";    else if(_hour>=1) result.text=parseInt(_hour) +"个小时前";    else if(_min>=1) result.text=parseInt(_min) +"分钟前";    else result.text="刚刚";    return result;}

  //此方法来源于 https://github.com/vuejs/vue-hackernews/blob/gh-pages/src/filters/index.js  function fromNow (dateStr) {      const between = Date.now() / 1000 - Number(new Date(dateStr.replace(/-/g,‘/‘)).getTime()) / 1000;      if (between < 3600) {          return (~~(between / 60)+‘分钟前‘);      } else if (between < 86400) {          return (~~(between / 3600)+‘小时前‘);      } else {          return (~~(between / 86400)+‘天前‘);      }  }

  function isToday(dateStr){      return (new Date().toDateString()==(new Date(dateStr.replace(/-/g,‘/‘)).toDateString()));  }