HTML Code

<!DOCTYPE html>

<html lang=en>

<head>

  <meta charset=UTF-8>

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

  <title>oncuechange — property</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}video{display:block;max-width:100%;width:320px;border-radius:8px;background:#0f172a;margin-bottom:.75rem}.log{padding:.75rem 1rem;background:#f0fdf4;border:1px solid #bbf7d0;border-radius:8px;font-size:.8125rem;max-width:420px;min-height:2.5rem}</style>

</head>

<body>

  <h1>track.oncuechange</h1>

  <p>Play the video — latest active cue text is shown below.</p>

  <video id=clip controls>

    <source src=/video/count.mp4 type=video/mp4>

    <track kind=captions src=/video/count.vtt srclang=en label=English>

  </video>

  <div class=log id=status>Cue change detected!</div>



  <script>

    var video = document.getElementById("clip");

    var status = document.getElementById("status");

    video.addEventListener("loadedmetadata", function () {

      var track = video.textTracks[0];

      track.mode = "showing";

      track.oncuechange = function () {

        var cues = track.activeCues;

        if (cues && cues.length) {

          status.textContent = "Active cue: " + cues[0].text;

        } else {

          status.textContent = "No active cue";

        }

      };

    });

  </script>

</body>

</html>

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HTML oncuechange Attribute — oncuechange Property