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/ui@5.0/dist/fancybox/fancybox.css"
          />
  </head>
  <body>
    <div>
      <a href="https://lipsum.app/id/1/400x300" data-fancybox="gallery" data-title="Title #1" data-caption="Caption #1"><img src="https://lipsum.app/id/1/200x150" loading="lazy" alt="" /></a>
      <a href="https://lipsum.app/id/2/400x300" data-fancybox="gallery" data-title="Title #2" data-caption="Caption #2"><img src="https://lipsum.app/id/2/200x150" loading="lazy" alt="" /></a>
      <a href="https://lipsum.app/id/3/400x300" data-fancybox="gallery" data-title="Title #3" data-caption="Caption #3"><img src="https://lipsum.app/id/3/200x150" loading="lazy" alt="" /></a>
      <a href="https://lipsum.app/id/4/400x300" data-fancybox="gallery" data-title="Title #4" data-caption="Caption #4"><img src="https://lipsum.app/id/4/200x150" loading="lazy" alt="" /></a>
      <a href="https://lipsum.app/id/5/400x300" data-fancybox="gallery" data-title="Title #5" data-caption="Caption #5"><img src="https://lipsum.app/id/5/200x150" loading="lazy" alt="" /></a>
    </div>
    <script src="https://cdn.jsdelivr.net/npm/@fancyapps/ui@5.0/dist/fancybox/fancybox.umd.js"></script>
    <script>
      Fancybox.bind('[data-fancybox]', {
        Toolbar: {
          items: {
            title: {
              tpl: `<div id="fancybox-title"></div>`
            }
          },
          display: {
            left: ['title']
          }
        },
        on : {
          "Carousel.ready Carousel.change" : (fancybox) => {
            const title = fancybox.getSlide().triggerEl.dataset.title;
            document.getElementById('fancybox-title').innerHTML = title;
          }
        }
      });    
    </script>
  </body>
</html>