JSFiddle - React, Tailwind, and code Playground

HTML

<textarea id="inputfoo"></textarea><br />
<div id="outputbar" style="font-family: Arial";></div>

CSS

#output 
{

}

JavaScript

$(document).ready(function() {
    $('#inputfoo').keyup(function() {
       $('#outputbar').html($(this).val().replace(/\n/g,'<br/>')); 
    });
});