JSFiddle - React, Tailwind, and code Playground
HTML
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.0/jquery.min.js"></script>
<div id="loader-progress" style="background-color: green;">
teste
</div>
JavaScript
$(document).ready(function(){
setTimeout(function(){
var count = 0;
var idIntervalo = setInterval(function(){
if(count == 105){ clearInterval(idIntervalo); }
$("#loader-progress").css("width", count + "%");
count++;
}, 100);
},2000);
});