JSFiddle - React, Tailwind, and code Playground

HTML

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width" />
    <link
          rel="stylesheet"
          href="https://cdn.jsdelivr.net/npm/@fancyapps/[email protected]/dist/fancybox/fancybox.css"
          />
  </head>
  <body>
    <div>
      <a data-fancybox="gallery" href="https://lipsum.app/id/60/1600x1200">
        <img src="https://lipsum.app/id/60/200x150" width="200" height="150" alt="" />
      </a>

      <div style="display:none">
        <a data-fancybox="gallery" href="https://lipsum.app/id/61/1600x1200">
          <img src="https://lipsum.app/id/61/120x80" />
        </a>
        <a data-fancybox="gallery" href="https://lipsum.app/id/62/1600x1200">
          <img src="https://lipsum.app/id/62/120x80" />
        </a>
        <a data-fancybox="gallery" href="https://lipsum.app/id/63/1600x1200">
          <img src="https://lipsum.app/id/63/120x80" />
        </a>
      </div>
      
      <button>Open gallery</button>
    </div>
    
    <script src="https://cdn.jsdelivr.net/npm/@fancyapps/[email protected]/dist/fancybox/fancybox.umd.js"></script>
  </body>
</html>

CSS

button {
  display: block;
  margin-top: 10px;
}

JavaScript

Fancybox.bind('[data-fancybox]', {});