JSFiddle - React, Tailwind, and code Playground

HTML

<div >
  <span id="janela" style='position: absolute; right:0'>
    LADO
  </span>
</div>

JavaScript

var pLeft = parseInt($('#janela').css("left"));

function moverFoto(){
  $('#janela').animate({left:pLeft},1000);
  pLeft -= 15;
}

setInterval(moverFoto,500);