在页面刷新时不重置的倒数计时器

Question

如何在JSF中创建倒数计时器？刷新页面时，我不希望定时器重置。

Answer 1

You can simply use Java Script for it.

或者

You can use RichFaces a4j:poll and poll count data from server where your timer will be running

Answer 2

您可以使用简单的这个脚本

var seconds = readCookie('countdown') || 60; 
     alert(seconds); 
     function secondPassed() 
     { 
      seconds--; 
      var minutes = parseInt(seconds/60); 
      var remainingSeconds = parseInt(seconds % 60); 
      if (remainingSeconds < 10) { 
       remainingSeconds = "0" + parseInt(remainingSeconds); 
      } 
      document.getElementById('countdown').innerHTML = minutes + " mins : " + remainingSeconds + " secs"; 
      if (parseInt(seconds) === 0) 
      { 
       alert("Time is over"); 
       clearInterval(countdownTimer); 
       document.getElementById('countdown').innerHTML = "Time is Over"; 
       document.forms["myForm"].submit(); 
       document.location.href = "examresult.jsp"; 
      } 
     } 
     var countdownTimer = setInterval(function() { 
      secondPassed(); 
      if (seconds === 0) { 
       eraseCookie(seconds); 
      } else { 
       createCookie(seconds, seconds, 7); 
      } 
     }, 1000);