JSFiddle - React, Tailwind, and code Playground

HTML

<html>
<body>

<iframe src="https://abc.123.com/" style="border: none; width: 100%; height: 100%">Your browser doesn't support iFrames.</iframe>

</body>
</html>

CSS

body, html {
    padding: 0;
    margin: 0;
    height: 100%;
    width: 100%;
}