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<head>

  <meta charset=UTF-8>

  <meta name=viewport content="width=device-width,initial-scale=1">

  <title>onwaiting — dynamic handler</title>

  <style>body{font-family:system-ui,sans-serif;margin:0;padding:1.5rem;background:#f8fafc;color:#334155;line-height:1.7}h1{margin:0 0 .75rem;font-size:1.25rem;color:#0f172a}audio{display:block;max-width:100%;margin-bottom:.75rem}#log{padding:.75rem 1rem;border-radius:8px;font-size:.875rem;max-width:420px;background:#f1f5f9;border:1px solid #e2e8f0;color:#475569}.hint{font-size:.875rem;color:#64748b;max-width:420px}</style>

</head>

<body>

  <h1>dynamicAudio.onwaiting</h1>

  <p class=hint>Slow the network in DevTools to trigger buffering while audio plays.</p>



  <audio id=dynamicAudio controls>

    <source src=/audio/count.mp3 type=audio/mpeg>

    Your browser does not support the audio element.

  </audio>

  <div id=log aria-live=polite>Waiting for buffering event…</div>



  <script>document.getElementById("dynamicAudio").onwaiting=function(){var e=document.getElementById("log");e.textContent="Audio is waiting for data — playback paused for buffering.",e.style.background="#eff6ff",e.style.borderColor="#bfdbfe",e.style.color="#1e40af"}</script>

</body>

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HTML onwaiting Attribute — dynamic handler