JavaScript定時器|隨機行爲

Question

我需要在特定時間間隔後顯示彈出窗口，其中倒數計時器運行5分鐘，如果在倒計時變爲0:00之前沒有互動，則會重定向到某個網址。我已經爲此寫了下面的js函數，但是它在計時器運行時爲負數或停止執行時有問題！下面是代碼 -

function displayOnTimeOut() { 
    window.docTitle = document.title; 
    var outputText = AdfPage.PAGE.findComponent('root:popupTxt'); 
    outputText.setValue(' '); 
    var timerInitDate = new Date(); 
    var endTime = timerInitDate.getMinutes() * 60 + timerInitDate.getSeconds() + 300; 
    function displayCountdown() { 
     var d = new Date(); 
     var timeNow = d.getMinutes() * 60 + d.getSeconds(); 
     var timeleft = endTime - timeNow; 
     var seconds = timeleft % 60; 
     var minutes = Math.floor(timeleft/60); 
     var minutesText = " minutes"; 
     if (minutes == 1) { 
      minutesText = " minute"; 
     } 
     var secondsText = " seconds"; 
     if (seconds == 1) { 
      secondsText = " second"; 
     } 
     if (seconds > 1 && seconds % 2 == 0) { 
      document.title = document.title == docTitle ? 'News Flash' : docTitle; 
     } 
     if (timeleft == 0) { 
      clearInterval(timerIntervalId); 
      window.onbeforeunload = null; 
      outputText.setValue(' '); 
      window.location.href = '/some/url.jspx'; 
      return; 
     } else { 
      outputText.setValue(minutes + minutesText + " and " + seconds + secondsText); 
     } 
    } 
    window.timerIntervalId = setInterval(displayCountdown, 1000); 
    var popup = AdfPage.PAGE.findComponentByAbsoluteId('root:popup'); 
    popup.show(); 
} 
var timeOutPeriod = 60 * 1000; 
if (typeof timerTimeoutId !== 'undefined') { 
    clearTimeout(timerTimeoutId); 
} 
if (typeof timerIntervalId !== 'undefined') { 
    clearTimeout(timerIntervalId); 
} 
window.timerTimeoutId = setTimeout(displayOnTimeOut, timeOutPeriod); 

請忽略如何/時，這就是所謂的，我需要的時候使用ExtendedRenderKitService調用。 我不是JS編碼方面的專家，因爲上面的代碼很明顯，請有人看看？

非常感謝。

謝謝！

Answer 1

function displayOnTimeOut() { 
    window.docTitle = document.title; 
    var outputText = AdfPage.PAGE.findComponent('root:popupTxt'); 
    outputText.setValue(' '); 
    var timerInitDate = new Date(); 
    var endTime = new Date(timerInitDate.getTime() + 5*60000) 
    function displayCountdown() { 
     var timeNow = new Date(); 
     var timeleft = endTime - timeNow; 

     if (timeleft <= 0) { 
      clearInterval(timerIntervalId); 
      window.onbeforeunload = null; 
      outputText.setValue(' '); 
      window.location.href = '/some/url.jspx'; 
      return; 
     } 

     var minutes = Math.floor(timeleft/60000); 
     var seconds = Math.floor(((timeleft % 60000)/1000)); 

     var minutesText = " minutes"; 
     if (minutes == 1) { 
      minutesText = " minute"; 
     } 
     var secondsText = " seconds"; 
     if (seconds == 1) { 
      secondsText = " second"; 
     } 
     if (seconds > 1 && seconds % 2 == 0) { 
      document.title = document.title == docTitle ? 'News Flash' : docTitle; 
     } 

     outputText.setValue(minutes + minutesText + " and " + seconds + secondsText); 
    } 
    window.timerIntervalId = setInterval(displayCountdown, 1000); 
    var popup = AdfPage.PAGE.findComponentByAbsoluteId('root:popup'); 
    popup.show(); 
} 
var timeOutPeriod = 60 * 1000; 
if (typeof timerTimeoutId !== 'undefined') { 
    clearTimeout(timerTimeoutId); 
} 
if (typeof timerIntervalId !== 'undefined') { 
    clearTimeout(timerIntervalId); 
} 
window.timerTimeoutId = setTimeout(displayOnTimeOut, timeOutPeriod);