<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
</head>
<body>
<script>
var pretime = "2018-04-07 14:38:16";
var minute = 1000 * 60;
var hour = minute * 60;
var day = hour * 24;
var halfamonth = day * 15;
var month = day * 30;
// 这是第一次关上页面时调用
getDate(pretime);
// 而后再每隔一分钟更新一次工夫
setInterval(function() {getDate(pretime);
}, 60000);
function getDate(dateTimeStamp){if(dateTimeStamp==undefined){return false;}else{dateTimeStamp = dateTimeStamp.replace(/-/g, "/");
var sTime = new Date(dateTimeStamp).getTime();// 把工夫 pretime 的值转为工夫戳
var now = new Date().getTime();// 获取以后工夫的工夫戳
var diffValue = now - sTime;
if(diffValue < 0){console.log("完结日期不能小于开始日期！");
}
var monthC =diffValue/month;
var weekC =diffValue/(7*day);
var dayC =diffValue/day;
var hourC =diffValue/hour;
var minC =diffValue/minute;
if(monthC>=1){console.log(parseInt(monthC) + "个月前");
}
else if(weekC>=1){console.log(parseInt(weekC) + "周前")
}
else if(dayC>=1){console.log(parseInt(dayC) +"天前")
}
else if(hourC>=1){console.log(parseInt(hourC) +"个小时前")
}
else if(minC>=1){console.log(parseInt(minC) +"分钟前")
}else{console.log("刚刚")
}
}
}
</script>
</body>
</html>
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