js获取两个时间差

	//计算时间差
	function DateDifference(faultDate,completeTime){
		// let d1 = new Date(faultDate);
		// let d2 = new Date(completeTime);
		var stime =new Date(faultDate).getTime();
		var etime = new Date(completeTime).getTime();
		var usedTime = etime - stime;  //两个时间戳相差的毫秒数
		var days=Math.floor(usedTime/(24*3600*1000));
		//计算出小时数
		var leave1=usedTime%(24*3600*1000);    //计算天数后剩余的毫秒数
		var hours=Math.floor(leave1/(3600*1000));
		//计算相差分钟数
		var leave2=leave1%(3600*1000);        //计算小时数后剩余的毫秒数
		var minutes=Math.floor(leave2/(60*1000));
		// var time = days + "天"+hours+"时"+minutes+"分";
		
		//计算分钟数
		var time = days * 24 * 60 + hours * 60 + minutes;
		//将分钟数转为小时数
		return (time / 60).toFixed(2);
	}