HTML Code

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>this vs currentTarget</title>
</head>
<body>
  <button id="btn" type="button">Click me</button>
  <pre id="out">Waiting...</pre>
  <script>
    var out = document.getElementById("out");
    var btn = document.getElementById("btn");

    btn.addEventListener("click", function (event) {
      out.textContent =
        "function: this === currentTarget → " +
        (this === event.currentTarget);
    });

    btn.addEventListener("click", (event) => {
      out.textContent +=
        "\narrow: use event.currentTarget.id → " +
        event.currentTarget.id +
        "\narrow: this === currentTarget → " +
        (this === event.currentTarget);
    });
  </script>
</body>
</html>

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Event.currentTarget — this vs currentTarget (Try It)