javascript edit template string using textarea code example

Example 1: capture textarea value

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

<script>
  var x = document.getElementById("myTextarea").value;
</script>

Example 2: jquery get textarea text

$('input#mybutton').click(function() {
    var text = $('textarea#mytextarea').val();
    //send to server and process response
});