HTML Code

<!DOCTYPE html>

<html lang=en>

<head>

  <meta charset=UTF-8>

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

  <title>onloadeddata — hide loader</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}#loader{padding:.75rem 1rem;background:#fef3c7;border:1px solid #fde68a;border-radius:8px;font-size:.8125rem;max-width:420px;margin-bottom:.75rem}#player{display:block;max-width:320px}</style>

</head>

<body>

  <h1>Hide spinner on loadeddata</h1>

  <p>Loader disappears when media data is ready.</p>

  <div id=loader aria-live=polite>Loading audio…</div>

  <audio id=player controls hidden>

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

  </audio>



  <script>var audio=document.getElementById("player"),loader=document.getElementById("loader");audio.addEventListener("loadeddata",(function(){loader.hidden=!0,audio.hidden=!1}))</script>

</body>

</html>

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HTML onloadeddata Attribute — Hide loading spinner