JSFiddle - React, Tailwind, and code Playground

HTML

<div id='chat_log'>

</div>

JavaScript

var lastId = 0;

function ajaxGo() {

    $.ajax({
        url: "/echo/html/",
        type: "POST",
        data: {
            'last': lastId,
            html: '<div class="message' + (parseInt(lastId) + 1) + '">' + (parseInt(lastId) + 1) + '</div>'
        },
        dataType: "html",

        success: function(result) {

            if (result) {
                $(result).appendTo('#chat_log').show();
                lastDiv = $('#chat_log').find('div:last-child');
                lastId = lastDiv[0].className.substring(7);
                console.log(lastIBd);

/*                if (!hasFocus && !titleCurrentlyChanging) {
                    changeTitle();
                }

                soundHandle = document.getElementById('soundHandle');
                soundHandle.src = '../Sounds/Message.wav';
                soundHandle.play();*/
            }
        }

    });
}

var timer = setInterval(ajaxGo, 500);