<!DOCTYPE html> <html> <head> <style> .container { position: relative; width: 50%; }
.image { display: block; width: 100%; height: auto; }
.overlay { position: absolute; top: 0; bottom: 0; left: 0; right: 0; height: 100%; width: 100%; opacity: 0; transition: .5s ease; background-color: #008CBA; }
.container:hover .overlay { opacity: 1; }
.text { color: white; font-size: 20px; position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); -ms-transform: translate(-50%, -50%); } </style> </head> <body>
<h2>Fade in Overlay</h2> <p>Hover over the image to see the effect.</p>
<div class="container"> <img src="img_avatar.png" alt="Avatar" class="image"> <div class="overlay"> <div class="text">Hello World</div> </div> </div>
</body> </html>