JSFiddle - React, Tailwind, and code Playground

HTML

<div></div>

JavaScript

var div = document.getElementsByTagName('div')[0];
var example = {
    user : "John",
    dollars: 12.57
};

setInterval(function() {
    var s, final;
    example.dollars += (parseInt(Math.floor(Math.random() * 2000 + 500)) / 100);

    s = example.dollars + .005 + '',
    final = s.substring(0, s.indexOf('.') + 3); 
    console.log(final);
    div.innerHTML += "<br>" + final;
}, 1000);