HTML Code

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>jQuery .children() — click</title>
  <style>
    .hilite { border: 2px solid red !important; }
    #container { border: 1px solid blue; padding: 8px; }
    div { margin: 8px; border: 1px solid #ccc; padding: 4px; }
  </style>
</head>
<body>
  <div id="container">
    <div>
      <p>Click me or my children</p>
      <span>Span child</span>
    </div>
    <p>Paragraph child of container</p>
  </div>
  <p id="results">Found <span>0</span> children in <span>TAG</span>.</p>
  <script src="https://code.jquery.com/jquery-3.7.1.min.js"></script>
  <script>
    $("#container").on("click", function (event) {
      $("*").removeClass("hilite");
      var kids = $(event.target).children();
      var len = kids.addClass("hilite").length;
      $("#results span").first().text(len);
      $("#results span").last().text(event.target.tagName);
      event.preventDefault();
    });
  </script>
</body>
</html>

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jQuery .children() — click to highlight (Try It)