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<head>

  <meta charset=UTF-8>

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

  <title>onvolumechange — audio 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}#status{margin-top:.75rem;padding:.75rem 1rem;border-radius:8px;font-size:.875rem;font-weight:600;max-width:420px;background:#eff6ff;border:1px solid #bfdbfe;color:#1e40af}.hint{font-size:.875rem;color:#64748b}</style>

</head>

<body>

  <h1>onvolumechange on audio</h1>

  <p class=hint>Drag the volume slider or click mute on the audio controls below.</p>

  <audio controls id=myMedia onvolumechange=updateVolume()>

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

  </audio>

  <p id=status aria-live=polite>Volume: 100%</p>



  <script>function updateVolume(){var e=document.getElementById("myMedia"),t=Math.round(100*e.volume),o=document.getElementById("status");o.textContent=e.muted?"Muted":"Volume: "+t+"%",o.style.background="#f0fdf4",o.style.borderColor="#bbf7d0",o.style.color="#166534"}</script>

</body>

</html>

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HTML onvolumechange Attribute — Inline audio handler