JSFiddle - React, Tailwind, and code Playground

HTML

<a href="#" class="addcomment">Add Comment</a>
<div id="addcomment">
<form name="comment" action="" method="post">
<input type="text" name="addcomment" size="80" />
    <input type="submit" value="Comment"/>
</form>  
    </div>

CSS

#addcomment {
    display : none;
}
.addcomment:active {
    display : none;
}
.addcomment:active + #addcomment {
    display : block;
    position : absolute;
    top : 5px;
}