一、实现当前时间到指定截止时间的倒计时功能
<html>
<head>
<title>TEST</title>
</head>
<body>
<script>
//获取当前时间距离截止时间的倒计时
//参数为截止时间
var leftTimer = function(year, month, day, hour, minute, second){ var leftTime = (new Date(year, month-1, day, hour, minute, second)) - (new Date());//计算剩余毫秒数
var days = parseInt(leftTime / 1000 / 60 / 60 / 24, 10);//计算剩余天数
var hours = parseInt(leftTime / 1000 / 60 / 60 % 24, 10);//计算剩余小时数
var minutes = parseInt(leftTime / 1000 / 60 % 60, 10);//计算剩分钟数
var seconds = parseInt(leftTime / 1000 % 60, 10);//计算剩余秒数
days = checkTime(days).toString(); hours = checkTime(hours).toString(); minutes = checkTime(minutes).toString(); seconds = checkTime(seconds).toString(); return days + ' : ' + hours + ' : ' + minutes + ' : ' + seconds } var checkTime = function(i){ if(i < 10){ i = "0" + i; } return i; } setInterval(function() { document.getElementById('testId').innerHTML = leftTimer(2018, 12, 31, 11, 0, 0) }, 1000) </script>
<div id="testId"> </div>
</body>
</html>
二、获取当前的年月日时分秒
var currTime = new Date(); //获取当前时间的毫秒数
var year = currTime.getFullYear(); //获取当前时间的年份
var month = currTime.getMonth() + 1; //获取当前时间的月份，月份从0开始，所以需要加一
var day = currTime.getDate(); //获取当前时间的日期，getDay()可以获取星期几
var hour = currTime.getHours(); //获取当前时间的小时数
var minute = currTime.getMinutes(); //获取当前时间的分钟数
var second = currTime.getSeconds(); //获取当前时间的秒数
三、毫秒数转成年月日时分秒
//毫秒数转换成时间
var getCurrentTime = function(milliseconds){ var myDate = new Date(milliseconds); var year = myDate.getFullYear(); var month = myDate.getMonth() + 1; var day = myDate.getDate() var hour = myDate.getHours(); var minute = myDate.getMinutes(); var second = myDate.getSeconds(); month = checkTime(month).toString(); day = checkTime(day).toString(); hour = checkTime(hour).toString(); minute = checkTime(minute).toString(); second = checkTime(second).toString(); return year+"-"+month+"-"+day+" "+hour+":"+minute+":"+second; } // 只有一位数字时添加“0”
var checkTime = function(i){ if(i < 10){ i = "0" + i; } return i; }
