JSFiddle - React, Tailwind, and code Playground

HTML

<div id="result" contenteditable="true"></div>
<button class="click">click to add text</butto>

CSS

#result {
    border: 1px solid black;
    width: 300px;
    height:200px;
}

JavaScript

var result = $('#result');


$('.click').click(function () {
    var preHtml = result.html();
    result.html(preHtml + "hello");
    result.focus();
});