HTML Code

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>open then moveTo</title>
</head>
<body>
  <h1>open() then moveTo()</h1>
  <button type="button" id="btn">Open and move</button>
  <pre id="out">Waiting...</pre>
  <script>
    document.getElementById("btn").onclick = function () {
      var win = window.open(
        "about:blank",
        "moved",
        "width=300,height=200"
      );
      if (!win) {
        document.getElementById("out").textContent = "Popup blocked";
        return;
      }
      win.document.write("<p>Moved with moveTo</p>");
      win.moveTo(50, 50);
      document.getElementById("out").textContent = "Called moveTo(50, 50)";
    };
  </script>
</body>
</html>

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JavaScript Window open() then moveTo() (Try It)