一、實現當前時間到指定截止時間的倒計時功能
<html>
<head>
<title>TEST</title>
</head>
<body>
<script>
//獲取當前時間距離截止時間的倒計時
//參數為截止時間
var leftTimer = function(year, month, day, hour, minute, second){ var leftTime = (new Date(year, month-1, day, hour, minute, second)) - (new Date());//計算剩余毫秒數
var days = parseInt(leftTime / 1000 / 60 / 60 / 24, 10);//計算剩余天數
var hours = parseInt(leftTime / 1000 / 60 / 60 % 24, 10);//計算剩余小時數
var minutes = parseInt(leftTime / 1000 / 60 % 60, 10);//計算剩分鍾數
var seconds = parseInt(leftTime / 1000 % 60, 10);//計算剩余秒數
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、獲取當前的年月日時分秒
var currTime = new Date(); //獲取當前時間的毫秒數
var year = currTime.getFullYear(); //獲取當前時間的年份
var month = currTime.getMonth() + 1; //獲取當前時間的月份，月份從0開始，所以需要加一
var day = currTime.getDate(); //獲取當前時間的日期，getDay()可以獲取星期幾
var hour = currTime.getHours(); //獲取當前時間的小時數
var minute = currTime.getMinutes(); //獲取當前時間的分鍾數
var second = currTime.getSeconds(); //獲取當前時間的秒數
三、毫秒數轉成年月日時分秒
//毫秒數轉換成時間
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; } // 只有一位數字時添加“0”
var checkTime = function(i){ if(i < 10){ i = "0" + i; } return i; }
