js中的時間與毫秒數互相轉換,倒計時
阿新 • • 發佈：2019-01-26
1、日期格式轉換成毫秒數
var oldTime = (new Date("2017-03-22 11:11:11")).getTime(); //得到毫秒數
也可以支援 "2017/03/22 11:11:11"
2、毫秒轉化成時間
var date = new Date(oldTime); //得到普通格式的時間
3、倒計時
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>倒計時</title> </head> <body> <div id="ytime"></div> <script type="text/javascript" src="http://apps.bdimg.com/libs/jquery/2.1.4/jquery.min.js"></script> <script type="text/javascript"> $(document).ready(function(){ var enddate = '2018/03/22 9:35:30'; run(enddate,'ytime');//引數：截止時間，節點id }); //定時器 var timer; function run(enddate,id){ //如果enddate為後臺傳入的Date型別，這裡直接轉化為毫秒數 enddate = (new Date(enddate.replace("T"," "))).getTime(); //以500毫秒的速度執行（可以避免方法執行速度慢會影響展示效果的情況）0 var time = 500; timer = setInterval("dateDif('"+enddate+"','"+id+"')",time); } //計算時間相差 function dateDif(enddate,id){ var date = enddate - new Date().getTime(); console.log(11); if(date <= 0){ $('#'+id).text('已超時'); clearInterval(timer); return; } var days = date / 1000 / 60 / 60 / 24; var daysRound = Math.floor(days); var hours = date/ 1000 / 60 / 60 - (24 * daysRound); var hoursRound = Math.floor(hours); var minutes = date / 1000 /60 - (24 * 60 * daysRound) - (60 * hoursRound); var minutesRound = Math.floor(minutes); var seconds = date/ 1000 - (24 * 60 * 60 * daysRound) - (60 * 60 * hoursRound) - (60 * minutesRound); var secondsRound = Math.floor(seconds); var time = "倒計時"+(daysRound+"天"+hoursRound +"時"+minutesRound+"分"+secondsRound+"秒"); $('#'+id).text(time); } </script> </body> </html>