JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap-theme.min.css">
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js"></script>
<script src="https://code.jquery.com/jquery-1.12.3.js"></script>
<script src="http://fonts.googleapis.com/css?family=Lato:300,700"></script>
<script src="http://fonts.googleapis.com/css?family=Lato:400,700"></script>
<textarea id="something"></textarea>
<script>
$("#something").keydown(function(e){
if (e.keyCode == 13 && !e.shiftKey)
{
  e.preventDefault();
  return false;
  }
});
</script>