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<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>Visible vs display and opacity</title>
  <style>
    body { font-family: sans-serif; padding: 16px; max-width: 28rem; }
    .box { width: 80px; height: 40px; margin: 8px 0; background: #c4b5fd; }
    #gone { display: none; }
    #invisible { visibility: hidden; }
    #transparent { opacity: 0; }
    pre { background: #1e293b; color: #e2e8f0; padding: 12px; border-radius: 6px; font-size: 13px; }
  </style>
</head>
<body>
  <div id="gone" class="box">display:none</div>
  <div id="invisible" class="box">visibility:hidden</div>
  <div id="transparent" class="box">opacity:0</div>
  <pre id="out"></pre>
  <script src="https://code.jquery.com/jquery-3.7.1.min.js"></script>
  <script>
    var lines = [
      "display:none → " + $("#gone").is(":visible"),
      "visibility:hidden → " + $("#invisible").is(":visible"),
      "opacity:0 → " + $("#transparent").is(":visible")
    ];
    $("#out").text(lines.join("\n"));
  </script>
</body>
</html>

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jQuery :visible — visibility vs display (Try It)