js时间转化为几天前,几小时前，几分钟前

转换标准时间为时间戳

function getDateTimeStamp(dateStr){

return Date.parse(dateStr.replace(/-/gi,"/"));

}

匹配不同时间段的值

function getDateDiff(dateTimeStamp){

var minute = 1000 * 60;

var hour = minute * 60;

var day = hour * 24;

var halfamonth = day * 15;

var month = day * 30;

var now = new Date().getTime();

var diffValue = now - dateTimeStamp;

if(diffValue < 0){return;}

var monthC =diffValue/month;

var weekC =diffValue/(7*day);

var dayC =diffValue/day;

var hourC =diffValue/hour;

var minC =diffValue/minute;

if(monthC>=1){

result="" + parseInt(monthC) + "月前";

}

else if(weekC>=1){

result="" + parseInt(weekC) + "周前";

}

else if(dayC>=1){

result=""+ parseInt(dayC) +"天前";

}

else if(hourC>=1){

result=""+ parseInt(hourC) +"小时前";

}

else if(minC>=1){

result=""+ parseInt(minC) +"分钟前";

}else

result="刚刚";

return result;

}