HTML Code

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>stop bubbling demo</title>
  <style>
    body { font-family: sans-serif; padding: 16px; max-width: 32rem; }
    .outer { padding: 20px; border: 2px solid #94a3b8; border-radius: 8px; background: #f8fafc; }
    .inner { margin-top: 12px; padding: 16px; border: 2px dashed #64748b; border-radius: 6px; background: #fff; }
    button { padding: 8px 14px; cursor: pointer; }
    #log { margin-top: 12px; padding: 12px; background: #f1f5f9; border-radius: 6px; font-size: 14px; line-height: 1.8; }
    #log div { padding: 2px 0; }
  </style>
</head>
<body>
  <div class="outer">Outer box (click handler on this)
    <div class="inner">
      <button type="button">Click inner button</button>
    </div>
  </div>
  <div id="log">Click the inner button.</div>
  <script src="https://code.jquery.com/jquery-3.7.1.min.js"></script>
  <script>
    $(".outer").on("click", function () {
      $("#log").append("<div>Outer handler ran</div>");
    });
    $(".inner button").on("click", function (event) {
      $("#log").html("");
      event.stopPropagation();
      $("#log").append("<div>Inner stopped bubble — flag: " +
        event.isPropagationStopped() + "</div>");
    });
  </script>
</body>
</html>

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jQuery event.isPropagationStopped() — stop bubbling (Try It)