window.onload = function(){
  var show_times = $(".times span");
  for(var i=0;i<show_times.length;i++){ 
    var dateStr = show_times[i].innerHTML;
    var dateTimeStamp = Date.parse(dateStr.replace(/-/gi,"/"));
    var minute = 1000 * 60;
    var hour = minute * 60;
    var day = hour * 24;
    var month = day * 30;
    //获取当前时间
    var now = new Date().getTime();
//计算时间差     
var diffValue = now - dateTimeStamp;     var monthC =diffValue/month;     var weekC =diffValue/(7*day);     var dayC =diffValue/day;     var hourC =diffValue/hour;     var minC =diffValue/minute;     if(monthC>=1){       show_times[i].innerHTML = dateStr;     }     else if(weekC>=1){       result="发表于" + parseInt(weekC) + "周前";       show_times[i].innerHTML = result;     }     else if(dayC>=1){       result="发表于"+ parseInt(dayC) +"天前";       show_times[i].innerHTML = result;     }     else if(hourC>=1){       result="发表于"+ parseInt(hourC) +"小时前";       show_times[i].innerHTML = result;     }     else if(minC>=1){       result="发表于"+ parseInt(minC) +"分钟前";       show_times[i].innerHTML = result;     }else{       result="发表于1分钟内";       show_times[i].innerHTML = result;     }   } }

很浅显易懂的js代码  大家基本上一看就懂了

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