JSFiddle - React, Tailwind, and code Playground

HTML

<!DOCTYPE html>
<html lang="ru">
<head>
  <title></title>
  <script
  src="https://code.jquery.com/jquery-3.4.1.js"></script>
  <script>
     window.onload = function() {
      var scr_w = window.outerWidth;
      $('.box').innerWidth(scr_w);
    };

    window.addEventListener('resize', function() {
      var scr_w = window.outerWidth;
      $('.box').innerWidth(scr_w);
    });
  </script>
  
  <style>
    html,
    body {
      width: 100%;
      height: 100%;
    }
    body {
      margin: 0;
    }
    iframe {
      position: absolute;
      width: 100%;
      height: 100%;
      min-width: 0;
    }
    .box {
      position: relative;
      height: 900px;
    }

  </style>
  
</head>
<body>
  <div class="box">
    <iframe id="fileUploadIframe" src="http://www.galiy-web.ru" frameborder="no"></iframe>
  </div>
</body>
</html>