Created
December 15, 2023 09:07
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Save TheBigRoomXXL/6b0d6379e4d41860ecd93df7071c5298 to your computer and use it in GitHub Desktop.
A zoomable image with just a bit of css and js
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| <!DOCTYPE html> | |
| <html lang="en"> | |
| <head> | |
| <meta charset="UTF-8"> | |
| <meta name="viewport" content="width=device-width, initial-scale=1.0"> | |
| <title>Image Loading Optimisation</title> | |
| <style> | |
| figure.zoom { | |
| background-position: 50% 50%; | |
| position: relative; | |
| overflow: hidden; | |
| cursor: zoom-in; | |
| width: min-content; | |
| /* 250% mean the zoom will be 2.5X */ | |
| background-size: 250%; | |
| } | |
| figure.zoom img:hover { | |
| opacity: 0; | |
| } | |
| figure.zoom img { | |
| transition: opacity 0.5s; | |
| display: block; | |
| width: 512px; | |
| } | |
| </style> | |
| <script> | |
| function zoom(e) { | |
| var zoomer = e.currentTarget; | |
| e.offsetX ? offsetX = e.offsetX : offsetX = e.touches[0].pageX; | |
| e.offsetY ? offsetY = e.offsetY : offsetX = e.touches[0].pageX; | |
| x = offsetX / zoomer.offsetWidth * 100; | |
| y = offsetY / zoomer.offsetHeight * 100; | |
| zoomer.style.backgroundPosition = x + '% ' + y + '%'; | |
| } | |
| </script> | |
| </head> | |
| <body> | |
| <figure class="zoom" onmousemove="zoom(event)" | |
| style="background-image: url(cat.webp)"> | |
| <img src="cat.webp" /> | |
| </figure> | |
| </body> | |
| </html> |
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