HTML Code

<!DOCTYPE html>

<html lang=en>

<head>

  <meta charset=UTF-8>

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

  <title>muted — video</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 1rem;font-size:1.25rem;color:#0f172a}video{max-width:100%;border-radius:8px;border:1px solid #e2e8f0}button{margin-top:.75rem;padding:.5rem 1rem;font:inherit;cursor:pointer;border-radius:6px;border:1px solid #cbd5e1;background:#fff}.status{margin-top:.75rem;font-size:.8125rem;color:#64748b;max-width:420px}code{background:#e2e8f0;padding:.1rem .35rem;border-radius:4px}</style>

</head>

<body>

  <h1>muted on &lt;video&gt;</h1>

  <video id=clip controls muted playsinline width=360>

    <source src=https://interactive-examples.mdn.mozilla.net/media/cc0-videos/flower.webm type=video/webm>

    Your browser does not support HTML video.

  </video>

  <button type=button id=toggleBtn>Unmute video</button>

  <p class=status id=status>Video starts muted because of the <code>muted</code> attribute.</p>



  <script>var clip=document.getElementById("clip"),btn=document.getElementById("toggleBtn"),status=document.getElementById("status");btn.addEventListener("click",(function(){clip.muted=!clip.muted,btn.textContent=clip.muted?"Unmute video":"Mute video",status.textContent=clip.muted?"video.muted is true — no audio output.":"video.muted is false — audio enabled."}))</script>

</body>

</html>

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HTML muted Attribute — Muted Video by Default