JSFiddle - React, Tailwind, and code Playground

HTML

<div>dfgdfgdfgfg</div>

<iframe  />

CSS

input{
    border:1px solid black;
}

input:focus{
    border:1px solid red;
}
div{
    width:100px;
    height:100px;
    background-color:#ddd;
}

JavaScript

$("div").click(function(){
    $(this).append("# ");
});
$("body").click(function(){
    $("iframe").focus();
});