JSFiddle - React, Tailwind, and code Playground

HTML

<div>
<button class="show">
Show gallery
</button>
</div>

<div class="gallery">
This is the gallery
</div>

CSS

.gallery {
  display:none;
}
.display {
  display:inline;
}

JavaScript

$( ".show" ).click(function() {
  $( ".gallery" ).addClass( "display" );
});