JSFiddle - React, Tailwind, and code Playground
HTML
<a id="floatbar" href="#">
<div class="popup">Hi there</div>
click here
</a>
CSS
#floatbar {
position:relative;
}
.popup {
position:absolute;
top:10px;
left:0px;
height:30px;
background:#ccc;
display:none;
}
JavaScript
$("#floatbar").click(function(e){
e.preventDefault();
$(this).find(".popup").fadeIn("slow");
});