JAVASCRIPT音頻應用程序：按鈕不會根據設備更改

這是一個簡單的控件的嵌入式音頻播放器。我做了這個作爲我的網站的插件。由於移動瀏覽器不支持自動播放功能。播放/暫停按鈕根據設備而改變，即：播放按鈕顯示在移動設備上，暫停按鈕顯示在電腦上JAVASCRIPT音頻應用程序：按鈕不會根據設備更改

播放器的移動側完美地工作。但是，即使音頻在後臺播放，它的PC端也以播放按鈕開始。即。 else條件不工作

如果錯誤的心不是清除請複製粘貼在這裏的代碼，看看：www.htmledit.squarefree.com

<head> 


     <script> 
      var playing = true; 

      if (/Android|iPhone|iPad|Mobile|Mobi|iPod|BlackBerry|BB|PlayBook|IEMobile|Windows Phone|Kindle|Silk|Opera Mini/i.test(navigator.userAgent)) { 
       playing = false; 
      } 
    <!-- THIS ELSE DOES NOT WORK . IT IS SUPPOSED TO CHANGE THE ICON TO PAUSE FROM PRE DEFINED PLAY ICON--> 
      else{ 
       document.getElementById('sound_icon').src = "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAADAAAAAwCAYAAABXAvmHAAAAuUlEQVRoQ+2YwQ2AIAxFYRwncS3WchLH0YN6IWp/QhtCeJ5rgfd/W0JOg3958P0nDtBbQRRAgUYCWKgRYPPv8yiwlO1QcO1l/YXilefZi6yA18JeeTjAl52w0E3GAoGFsJDRk7FQDcirf3vloYgpYor4IsBlrnaC1b/pQhUxLISFPtqpVUtMYiYxk5hJ/O4Bq3swiaedxMq7aI8Y+S7UY3PKmhxAoRQZgwKRdJXcKKBQioxBgUi6Su4TGV3gMZ8LoyUAAAAASUVORK5CYII="; 
      } 



      function EvalSound(soundobj) { 
       var thissound = document.getElementById(soundobj); 

       if (!playing) { 
        thissound.play(); 
        playing = true; 
        document.getElementById('sound_icon').src = "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAADAAAAAwCAYAAABXAvmHAAAAuUlEQVRoQ+2YwQ2AIAxFYRwncS3WchLH0YN6IWp/QhtCeJ5rgfd/W0JOg3958P0nDtBbQRRAgUYCWKgRYPPv8yiwlO1QcO1l/YXilefZi6yA18JeeTjAl52w0E3GAoGFsJDRk7FQDcirf3vloYgpYor4IsBlrnaC1b/pQhUxLISFPtqpVUtMYiYxk5hJ/O4Bq3swiaedxMq7aI8Y+S7UY3PKmhxAoRQZgwKRdJXcKKBQioxBgUi6Su4TGV3gMZ8LoyUAAAAASUVORK5CYII="; 
       } else if (playing) { 
        thissound.pause(); 
        playing = false; 
        document.getElementById('sound_icon').src = "data:image/png;base64,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"; 
       } 
      } 

     </script> 
    </head> 



    <body> 

     <a href="javascript:null()" onClick="EvalSound('sound1'); return false; "> 

<!-- PRE DEFINED PLAY ICON IS BELOW --> 

      <img src="data:image/png;base64,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" id="sound_icon" name="Sound" width="" height="" title="Background Music Controls" class="" /></a> 


     <audio id="sound1" style="display: none; width: 0px; height: 0px;" src="https://audio.clyp.it/3fnnuaiw.mp3?Expires=1488659248&Signature=01NkRScwYO4XaJO46JuNzPRR6cYQfcL5~rJzAu-gIoNoXkiMVZwazwT--amuqYvreLCSRFnFAFUvwR3v9Xaq1iB4~OmKSWqtF9mSm-CUB2Moqtie8wpGIRxTAkDHnfhN0sy45sINjwFP2xyVumld78USPuCBfNU3kgux69YG-yA_&Key-Pair-Id=APKAJ4AMQB3XYIRCZ5PA" controls preload="auto" autobuffer autoplay> 
    </body>

來源

2017-03-04 Saurav Suresh

當裝載在報頭中的腳本部分之前的運行頁面在DOM處創建的元素。請參閱this other answer以更好地瞭解它的工作原理。

有它的工作，你可以在最後加載腳本：

<body> 
 

 
    <a href="javascript:null()" onClick="EvalSound('sound1'); return false; "> 
 

 
<!-- PRE DEFINED PLAY ICON IS BELOW --> 
 

 
     <img src="data:image/png;base64,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" id="sound_icon" name="Sound" width="" height="" title="Background Music Controls" class="" /></a> 
 

 

 
    <audio id="sound1" style="display: none; width: 0px; height: 0px;" src="https://audio.clyp.it/3fnnuaiw.mp3?Expires=1488659248&Signature=01NkRScwYO4XaJO46JuNzPRR6cYQfcL5~rJzAu-gIoNoXkiMVZwazwT--amuqYvreLCSRFnFAFUvwR3v9Xaq1iB4~OmKSWqtF9mSm-CUB2Moqtie8wpGIRxTAkDHnfhN0sy45sINjwFP2xyVumld78USPuCBfNU3kgux69YG-yA_&Key-Pair-Id=APKAJ4AMQB3XYIRCZ5PA" controls preload="auto" autobuffer autoplay> 
 

 
    <script> 
 
     var playing = true; 
 
     var flag = false; 
 
     if (/Android|iPhone|iPad|Mobile|Mobi|iPod|BlackBerry|BB|PlayBook|IEMobile|Windows Phone|Kindle|Silk|Opera Mini/i.test(navigator.userAgent)) { 
 
      playing = false; 
 
     } else{ 
 
      document.getElementById('sound_icon').src = "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAADAAAAAwCAYAAABXAvmHAAAAuUlEQVRoQ+2YwQ2AIAxFYRwncS3WchLH0YN6IWp/QhtCeJ5rgfd/W0JOg3958P0nDtBbQRRAgUYCWKgRYPPv8yiwlO1QcO1l/YXilefZi6yA18JeeTjAl52w0E3GAoGFsJDRk7FQDcirf3vloYgpYor4IsBlrnaC1b/pQhUxLISFPtqpVUtMYiYxk5hJ/O4Bq3swiaedxMq7aI8Y+S7UY3PKmhxAoRQZgwKRdJXcKKBQioxBgUi6Su4TGV3gMZ8LoyUAAAAASUVORK5CYII="; 
 
     } 
 

 

 

 
     function EvalSound(soundobj) { 
 
      var thissound = document.getElementById(soundobj); 
 

 
      if (!playing) { 
 
       thissound.play(); 
 
       playing = true; 
 
       document.getElementById('sound_icon').src = "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAADAAAAAwCAYAAABXAvmHAAAAuUlEQVRoQ+2YwQ2AIAxFYRwncS3WchLH0YN6IWp/QhtCeJ5rgfd/W0JOg3958P0nDtBbQRRAgUYCWKgRYPPv8yiwlO1QcO1l/YXilefZi6yA18JeeTjAl52w0E3GAoGFsJDRk7FQDcirf3vloYgpYor4IsBlrnaC1b/pQhUxLISFPtqpVUtMYiYxk5hJ/O4Bq3swiaedxMq7aI8Y+S7UY3PKmhxAoRQZgwKRdJXcKKBQioxBgUi6Su4TGV3gMZ8LoyUAAAAASUVORK5CYII="; 
 
      } else if (playing) { 
 
       thissound.pause(); 
 
       playing = false; 
 
       document.getElementById('sound_icon').src = "data:image/png;base64,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"; 
 
      } 
 
     } 
 

 
    </script> 
 
</body>

或負載窗口後，裝有window.onload

<head> 
 
<script> 
 
    var playing = true; 
 
    var flag = false; 
 

 
    window.onload = function() { 
 
    if (/Android|iPhone|iPad|Mobile|Mobi|iPod|BlackBerry|BB|PlayBook|IEMobile|Windows Phone|Kindle|Silk|Opera Mini/i.test(navigator.userAgent)) { 
 
     playing = false; 
 
    } else { 
 
     document.getElementById('sound_icon').src = "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAADAAAAAwCAYAAABXAvmHAAAAuUlEQVRoQ+2YwQ2AIAxFYRwncS3WchLH0YN6IWp/QhtCeJ5rgfd/W0JOg3958P0nDtBbQRRAgUYCWKgRYPPv8yiwlO1QcO1l/YXilefZi6yA18JeeTjAl52w0E3GAoGFsJDRk7FQDcirf3vloYgpYor4IsBlrnaC1b/pQhUxLISFPtqpVUtMYiYxk5hJ/O4Bq3swiaedxMq7aI8Y+S7UY3PKmhxAoRQZgwKRdJXcKKBQioxBgUi6Su4TGV3gMZ8LoyUAAAAASUVORK5CYII="; 
 
    } 
 
    } 
 

 

 

 
    function EvalSound(soundobj) { 
 
    var thissound = document.getElementById(soundobj); 
 

 
    if (!playing) { 
 
     thissound.play(); 
 
     playing = true; 
 
     document.getElementById('sound_icon').src = "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAADAAAAAwCAYAAABXAvmHAAAAuUlEQVRoQ+2YwQ2AIAxFYRwncS3WchLH0YN6IWp/QhtCeJ5rgfd/W0JOg3958P0nDtBbQRRAgUYCWKgRYPPv8yiwlO1QcO1l/YXilefZi6yA18JeeTjAl52w0E3GAoGFsJDRk7FQDcirf3vloYgpYor4IsBlrnaC1b/pQhUxLISFPtqpVUtMYiYxk5hJ/O4Bq3swiaedxMq7aI8Y+S7UY3PKmhxAoRQZgwKRdJXcKKBQioxBgUi6Su4TGV3gMZ8LoyUAAAAASUVORK5CYII="; 
 
    } else if (playing) { 
 
     thissound.pause(); 
 
     playing = false; 
 
     document.getElementById('sound_icon').src = "data:image/png;base64,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"; 
 
    } 
 
    } 
 

 
</script> 
 
</head> 
 

 
<body> 
 

 
<a href="javascript:null()" onClick="EvalSound('sound1'); return false; "> 
 

 
<!-- PRE DEFINED PLAY ICON IS BELOW --> 
 

 
<img src="data:image/png;base64,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" id="sound_icon" name="Sound" width="" height="" title="Background Music Controls" class="" /></a> 
 

 

 
<audio id="sound1" style="display: none; width: 0px; height: 0px;" src="https://audio.clyp.it/3fnnuaiw.mp3?Expires=1488659248&Signature=01NkRScwYO4XaJO46JuNzPRR6cYQfcL5~rJzAu-gIoNoXkiMVZwazwT--amuqYvreLCSRFnFAFUvwR3v9Xaq1iB4~OmKSWqtF9mSm-CUB2Moqtie8wpGIRxTAkDHnfhN0sy45sINjwFP2xyVumld78USPuCBfNU3kgux69YG-yA_&Key-Pair-Id=APKAJ4AMQB3XYIRCZ5PA" controls preload="auto" autobuffer autoplay> 
 

 
</body>

來源

2017-03-04 21:01:41 giorni

**非常感謝您抽出時間給這樣一個愚蠢的問題提供這樣一個真棒解釋!!!!。它完美的作品。這是我第一次嘗試任何html/js。請檢查它在我的網站上的行動kzsh.weebly.com –

沒問題@SauravSuresh！在你的網站上幹得不錯。很高興知道我可以提供幫助。順便說一句，如果這個或任何答案已解決您的問題，請點擊複選標記考慮[接受它]（http://meta.stackexchange.com/q/5234/179419）。這向更廣泛的社區表明，您已經找到了解決方案，併爲答覆者和您自己提供了一些聲譽。沒有義務這樣做。 – giorni

是的。我已經接受了！再次感謝！！！ –

JAVASCRIPT音頻應用程序：按鈕不會根據設備更改

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