get textarea value jquery

<textarea id="myTextarea">
Hello World
</textarea>

<script>
  var x = document.getElementById("myTextarea").value;
</script>$('input#mybutton').click(function() {
    var text = $('textarea#mytextarea').val();
    //send to server and process response
});var message = $('textarea#message').val();
$("textarea").val()