HTML Code

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>currentTarget vs target</title>
  <style>
    #parent, #child { margin: 0.5rem; padding: 1rem; border: 1px solid black; }
    button, pre { margin: 0.5rem; }
  </style>
</head>
<body>
  <div id="parent">
    Click parent
    <div id="child">Click child</div>
  </div>
  <button id="reset" type="button">Reset</button>
  <pre id="output">Waiting...</pre>
  <script>
    var output = document.querySelector("#output");
    var parent = document.querySelector("#parent");
    parent.addEventListener("click", function (event) {
      var currentTarget = event.currentTarget.getAttribute("id");
      var target = event.target.getAttribute("id");
      output.textContent = "Current target: " + currentTarget + "\n";
      output.textContent += "Target: " + target;
    });
    document.querySelector("#reset").addEventListener("click", function () {
      document.location.reload();
    });
  </script>
</body>
</html>

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Event.currentTarget — vs target (Try It)