JSFiddle - React, Tailwind, and code Playground

HTML

<h1 id="title">Text Before Load</h1>

JavaScript

$.ajax({
    url: "/echo/json/",
    data: {
        json: JSON.stringify({
            message: 'Text After Load , hahahah'
        }),
        delay: 3
    },
    type: "POST"
}).done(function (data) {
    $("#title").text(data.message);
});