JSFiddle - React, Tailwind, and code Playground

HTML

<div class="myDiv">some text</div>

CSS

.myDiv{width:196px;height:196px}

JavaScript

$(document).ready(function(){
  var colors = ["http://boom-x.su/BG_01.jpg","http://boom-x.su/BG_02.jpg"];               
  var rand = Math.floor(Math.random()*colors.length);          
  $(".myDiv").css({"background-image":"url(colors["+rand+"])"});
   
});