LazyLoad item thumbnails

[mathewjordan]

On larger manifests with many items, rendering/loading is slow as offscreen item thumbnails are rendered and images are requested. Should we build in some lazyloading mechanism using interaction-observer to only render the visible (or nearly visible) items?

Note: Trey Pendragon noticed this slowness when rendering a very large in items length manifest.

[tarjelavik]

Hi! I'd love this enhancement :-).

Have a 600ish page document that loads very slow. With images from my bad Image API level0 "placeholder" service, so some of the blame is mine :-/.

[lukew-cogapp]

+1 for this one, we have manifests with 1000+ pages sometimes.