JSFiddle - React, Tailwind, and code Playground

HTML

<div class="iframeContainer">
   <iframe src="https://prosolutionplus.com/">
   </iframe>
</div>

CSS

iframe {
         display: block;       /* iframes are inline by default */
         border: none;         /* Reset default border */
         height: 100vh;        /* Viewport-relative units */
         width: 100vw;
         }