JSFiddle - React, Tailwind, and code Playground

HTML

<div id="finalCont2">
  <div id="insidewrapper2">
    <div id="outsidewrapper2">
      <div class="fullheight2">
        <iframe id="template_preview_iframe" src="http://www.w3schools.com"></iframe> 
      </div>
    </div>
  </div>
</div>

CSS

#insidewrapper2{
background-image:url('data:image/jpeg;base64,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...