HTML Code

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>legacy over out</title>
  <style>
    body { font-family: sans-serif; padding: 16px; }
    .card { display: inline-block; padding: 16px 24px; margin-right: 10px; background: #f1f5f9; border: 1px solid #cbd5e1; border-radius: 8px; cursor: default; transition: background 0.15s; }
    .card.highlight { background: #eef2ff; border-color: #6366f1; box-shadow: 0 2px 8px rgba(99,102,241,0.2); }
    #log { margin-top: 12px; color: #4338ca; font-size: 14px; max-width: 420px; line-height: 1.5; }
  </style>
</head>
<body>
  <div class="card">Card A</div>
  <div class="card">Card B</div>
  <div id="log">Legacy .mouseover() + .mouseout() — migrate to .on() in new code.</div>
  <script src="https://code.jquery.com/jquery-3.7.1.min.js"></script>
  <script>
    $(".card")
      .mouseover(function() {
        $(this).addClass("highlight");
        $("#log").text("mouseover → highlight on " + $(this).text());
      })
      .mouseout(function() {
        $(this).removeClass("highlight");
        $("#log").text("mouseout → highlight removed on " + $(this).text());
      });
  </script>
</body>
</html>

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jQuery .mouseout() — legacy mouseover + mouseout (Try It)