JSFiddle - React, Tailwind, and code Playground

HTML

<a href="#" id="opn">open</a>
<div class="panelinfo">
    
</div>

<a href="#" id="opn">open</a>
<div class="panelinfo">
    
</div>

CSS

.panelinfo {
    width:100px;
    height:100px;
    background:red;
    display:none;
}

JavaScript

$("#opn").click(function(){            
        $(".panelinfo").slideToggle("slow");
         return false;
  });