JSFiddle - React, Tailwind, and code Playground

by Slava

HTML

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Lightbox with Popover API (No JavaScript)</title>
    <style>

    </style>
</head>
<body>
		<button  popovertarget="lightbox">
    <img src="https://picsum.photos/800/600" class="thumbnail">
		</button>
    
    <div id="lightbox" class="lightbox" popover>
        <img src="https://picsum.photos/800/600" class="fullscreen-image">
        <button class="close-button" popovertarget="lightbox" popovertargetaction="hide">×</button>
    </div>
</body>
</html>

CSS

.thumbnail {
  width: 100px;
  height: 100px;
  object-fit: cover;
  cursor: pointer;
}
.lightbox {
  background: rgba(0, 0, 0, 0.8);
  transition: all 0.3s ease;
  opacity: 0;
  transform: scale(0.8);
}
.lightbox:popover-open {
  opacity: 1;
  transform: scale(1);
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: zoom-out;
}
.fullscreen-image {
  max-width: 100%;
  max-height: 100vh;
  object-fit: contain;
}
.close-button {
  position: absolute;
  top: 20px;
  right: 20px;
  color: white;
  font-size: 24px;
  cursor: pointer;
  background: none;
  border: none;
}