open close tab

<!DOCTYPE html>
<html>
  <body>
    <p>Click the button to open a new browser window.</p>
    <button onclick="myFunction()">Try it</button>
    <button onclick="closeFunction()">Close</button>
    <script>
      function myFunction() {
        myWindow = window.open("https://www.google.com");
      }

      function closeFunction() {
        myWindow.close();
      }
    </script>
  </body>
</html>