A live preview text editor

index.html

<!-- Basic comment/answer box setup  -->
<textarea name="Answer" id="Answer" placeholder="Answer"></textarea>
<div id="livePre"></div>

index.js

// setting the variable 'liveView' to the html div id: Answer
var liveView = document.getElementById('Answer');

// on Answer's keyup I retrieve the inner HTML and set it to the div 'liveView'
liveView.onkeyup = function () {
  document.getElementById('livePre').innerHTML = this.value;
}

// Demo: https://jsfiddle.net/chrisseldo/qky7xf0j/3/