JSFiddle - React, Tailwind, and code Playground
HTML
<a href="javascript:unhide('displaybx');">CLICK</a>
<div id="displaybx" class="hidden">Content to be revealed</div>
CSS
.hidden {display: none;}
.unhidden {display: block;}
JavaScript
<script type="text/javascript">
function unhide(divID) {
var item = document.getElementById(divID);
if (item) {
item.className=(item.className=='hidden')?'unhidden':'hidden';
}
}
</script>