JSFiddle - React, Tailwind, and code Playground

HTML

<div id="box" style="width:30px;height:30px;background-color:red;position:absolute;"></div>

JavaScript

window.e = document.getElementById("box");
var i = 0;

setInterval(function () {
    i = i + 20;
    window.e.style.left = i + "px";;
},1000);