JSFiddle - React, Tailwind, and code Playground

HTML

<iframe src="https://sg.hu/forum/tema/1043617395"></iframe>

CSS

* {
  margin:0;
  padding:0;
}

body,html {
  height:100%;
  overflow:hidden;
}

iframe {
  position:absolute;
  left:0px;
  top:0px;
  width:100%;
  height:100%;
  border:none;
}