JSFiddle - React, Tailwind, and code Playground

HTML

<div id="box1">
 <form action="">
 <input type="string" name="htmlcode" />
 </form>
 </div>

CSS

#box1 { 
    width:100px;
     height:100px;
    border:4px solid black;
}
 input {display:none;}
 #box1:hover input{display:block;}