js时间转化为几天前,几小时前，几分钟前

在前面一篇文章中，我们学习到了如何获取时间和怎么算出两者之间的时间差

今天看看怎么将时间戳转换为几个月前，几周前，几天前，几分钟前的形式。与上面类似通过JavaScript计算当前时间与定义的时间的对比，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;
    }

转换标准时间为时间戳：

function getDateTimeStamp(dateStr){
 return Date.parse(dateStr.replace(/-/gi,"/"));
}