JSFiddle - React, Tailwind, and code Playground

HTML

<form target="search">
    <input type="text" name="user">
    <input type="submit">
</form>
<iframe id="search" name="search"></iframe>

CSS

iframe {
    width:30em;
    height: 30em;
    margin: 1em;
    display: none;
}

JavaScript

document.forms[0].onsubmit = function(){
document.getElementById("search").style.display = "block";
}