JSFiddle - React, Tailwind, and code Playground

by uttara

HTML

<div>DIV</div>
<iframe></iframe>

CSS

div{
    min-width:100px;
    height:100px;
    background-color:red;
    float:left;
}
iframe{
    float:left;
    border:none;
    background-color:yellow;
}

JavaScript

$(document).ready(function(){
    var iframeW = $(window).innerWidth() - 100;
    $("iframe").css("width", iframeW + "px")
});