JSFiddle - React, Tailwind, and code Playground

HTML

<div id="all">
           <h1>Welcome to the awesome chat system.</h1>
           <input type="text" id="name"><br/>
           <textarea  rows='30' id="chatArea" disabled='true'>
           </textarea>
           <textarea id="writtenThing" onkeyup="keyfunction(event)"></textarea>
           <button id="send">Send</button>
    </div>

JavaScript

function keyfunction(e)
            {
                if(e.keyCode == 13 || e.which == 13)
                {
                    alert("things to do...");
                }
            }