JSFiddle - React, Tailwind, and code Playground

HTML

<a href="javascript:toggle_visibility('div');">help</a>

<div id="div"style="display: none;">
help
</div>

JavaScript

function toggle_visibility(id) {
       var e = document.getElementById(id);
       if(e.style.display == 'block')
          e.style.display = 'none';
       else
          e.style.display = 'block';
    }