K7: a vanilla JavaScript gallery lightbox that fits in ~7.7 KB — JS and CSS in a single file, no dependencies.
Key features:
- Fullscreen overlay with keyboard navigation (arrow keys + Escape)
- Swipe gesture support for mobile
- Autoplay mode tied to image load completion
- Download button for the current image
- High-res loading from a
large/subfolder on click - CSS custom properties for theming
One <script> tag and it activates on all targeted images. Great for portfolios, product galleries, and docs sites.
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