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<head>

  <meta charset=UTF-8>

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

  <title>onstalled — inline on audio</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}#status{padding:.75rem 1rem;border-radius:8px;font-size:.875rem;font-weight:600;max-width:420px;background:#f1f5f9;border:1px solid #e2e8f0;color:#475569}.hint{font-size:.875rem;color:#64748b}</style>

</head>

<body>

  <h1>onstalled on audio</h1>

  <p class=hint>Play the audio. Throttle network in DevTools (Slow 3G) to trigger stalled.</p>



  <audio controls onstalled=handleStalled()>

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

    Your browser does not support the audio element.

  </audio>

  <p id=status>Ready — press play</p>



  <script>function handleStalled(){var e=document.getElementById("status");e.textContent="Audio loading has stalled!",e.style.background="#fef3c7",e.style.borderColor="#fde68a",e.style.color="#92400e"}document.querySelector("audio").addEventListener("playing",(function(){var e=document.getElementById("status");e.textContent="Playing",e.style.background="#f0fdf4",e.style.borderColor="#bbf7d0",e.style.color="#166534"}))</script>

</body>

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HTML onstalled Attribute — inline handler on audio