JSFiddle - React, Tailwind, and code Playground

HTML

<textarea rows="10" cols="50"></textarea>

<h1>Text</h1>
<div id="target"></div>

CSS

h1 {
    margin: 10px 0;
    font-size: 1em;
    font-weight: bold;
}
div {
    padding: 10px;
    border: 1px solid black;
}

JavaScript

$("textarea").bind('keyup keydown', function() {
   $("#target").html(this.value);
})