jQuery 단방향 바인딩

<!DOCTYPE html>
<html>

  <head>
    <meta charset="utf-8" />
    <title></title>
    <link rel="stylesheet" href="style.css" />
    <script data-require="jquery" data-semver="2.1.4" src="https://code.jquery.com/jquery-2.1.4.js"></script>
    <script src="script.js"></script>
  </head>

  <body>
    <input type="text" id="txtText" />
    <h1 id="p"></h1>
  </body>

</html>

// Add your javascript here
$(function(){
  $("#txtText").keyup(function() {
      $("#p").text($(this).val());
  })
});

/* Put your css in here */

h1 {
  color: red;
}