JSFiddle - React, Tailwind, and code Playground

HTML

<iframe style="width:100%;height:45px;position:fixed;top:0px;left:0px;z-index:2147483649" src="" scrolling="no" frameborder="0px"></iframe>
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CSS

html , body,iframe {
    padding:0px;
    margin:0px;
}
body {
    margin-top:50px; /*height of the iframe */
    height:1000px;
}