HTML Code

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>elementFromPoint MDN</title>
  <style>body{font-family:system-ui,sans-serif;padding:1.5rem;margin:0;} button{margin-right:0.5rem;} pre{border:1px solid #ccc;padding:0.75rem;}</style>
</head>
<body>
  <p id="para1">Some text here</p>
  <button type="button">Blue</button>
  <button type="button">Red</button>
  <pre id="out">Click a color button</pre>
  <script>
    function changeColor(newColor) {
      var elem = document.elementFromPoint(2, 2);
      if (!elem) {
        document.getElementById("out").textContent = "null";
        return;
      }
      elem.style.color = newColor;
      document.getElementById("out").textContent =
        "styled: " + elem.tagName + " → " + newColor;
    }
    document.querySelectorAll("button").forEach(function (button) {
      button.addEventListener("click", function (event) {
        changeColor(event.target.textContent.toLowerCase());
      });
    });
  </script>
</body>
</html>

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Document.elementFromPoint — MDN color at (2,2) (Try It)