Edit in JSFiddle

new Vue({
  el: "#demo",
  data: {
    value: "Hello, how are you?"
  }
});
<div id="demo">
  <input type="text" v-model="value">
  <br>
  <p>{{ value }}</p>
  <!-- This stringifies the contents of the data object and displays it on the page -->
  <pre>{{ $data }}</pre>
</div>