Parallelism is a horizontal masonry gallery — an intro tile followed by eight staggered thumbs that scroll sideways with the mouse wheel, arrow keys, or edge zones. You want that scroll behavior wired up on a real Dune site, not a static HTML5 UP export where the thumbs link to files that no longer exist.
From JSR (recommended)
dune theme:install jsr:@dune/theme-parallelism@1.0.1 --activate
Pins an exact version in the site import map. After install, dune lockfile:sync picks up the change — the wheel/keyboard scroll script, the
mobile overflow-x fallback, and the vendored static/html5up/ thumbnail
images all ship with the theme package.
From a ZIP
Grab parallelism-1.0.1.zip from
dune-themes releases,
extract into themes/parallelism/, then set:
# site.yaml
theme:
name: parallelism
Same package either way. JSR is easier to keep updated across releases; the ZIP path suits teams vendoring theme code directly into a monorepo instead of resolving it from the registry at build time.