IIIF Deep-Zoom Before/After Block
by Pixy Puala on WordPress.org
Compare two ultra-high-resolution IIIF images with a draggable before/after reveal and synchronized pan/zoom, powered by OpenSeadragon.
This block is purpose-built for galleries, museums, restoration projects, cartography, and microscopy.
Paste two IIIF endpoints (either Image API info.json or manifests v2/v3) and get a deep-zoom comparison with lockstep pan/zoom.
Features
* Synchronized pan/zoom using OpenSeadragon (bundled, BSD-3-Clause)
* Accepts IIIF Image API info.json or IIIF Manifests (v2/v3)
* Draggable reveal slider + accessible range input
* Labels (e.g., “Before” / “After”), start position, and optional badges
* Align wide/full support; server-side render with sanitized output
* No tracking, no external calls beyond the IIIF URLs you provide
Privacy
This plugin does not collect, store, or transmit personal data.
