Closed, the folder sat mid-drawer under the one short Posters section with
empty space below, so it read as a caption with nothing under it and was easy
to miss on a phone. Open, its plugins show like any section's rows; a reader
can still collapse it. check:posterverse-shelf asserts the open default, and
its self-test plants a closed folder.
A host that serves the tree with Last-Modified and no Cache-Control lets a browser run its cached files for
hours. Measured: a typed-URL revisit after a deploy requested none of the gallery, the manifest or the bundles,
so a returning reader ran the old files, or an old manifest against a new bundle.
- The manifest is fetched with cache 'no-cache', so it is always revalidated (a 304 when unchanged).
- A fingerprint of the manifest (every bundle's integrity) is kept per tree. When it differs from the reader's
last visit, every bundle the browser already holds gets one conditional request before any tab mounts:
a 304 refreshes it, and a 200 is cancelled at its headers, which drops the stale copy. The plain <script>
that follows, the gallery's own or a composite's for its children, then runs the new file at the same URL.
- A version query is not used: loadScriptOnce keys its registry by the full href, so X.js?v= next to a
composite's plain X.js would run the bundle twice.
- A first visit with an empty cache costs nothing extra (only-if-cached finds nothing held), and so does an
ordinary visit with an unchanged manifest. The mount waits at most 8 s for the check.
A preset page loads only poster-sections.js, so a preset of a poster type
registered by another plugin's script (upg100-list) could only say No
posters. The generator now gives no presets to a type whose file is not on
the tree, and check:poster-sections fails on any such preset: 9 presets
remain (7 regions, all regions, configure).
The tree generator writes a page per preset but never deletes one, so the
dropped presets' pages (the 10 upg100 ones and countries-other) are removed,
and a new arm holds the built preset pages to exactly the presets.
The pilot's country data now places every country in a real region, so the
country type has 7 regions. gen:poster-sections-presets regenerated the list
(19 presets); check:poster-sections had failed on the stale countries-other
preset and passes now. Bundle, tree and SRI rebuilt.
The measure-once design missed a host restyled from sized to height:auto after mount WITH in-flow content: it
stayed sized at its content height instead of getting the floor back, as the old probe did.
- After mount, follow() re-probes only when the reading says the host may have changed kind: floor on and the
host shorter than the floor (styled after mount, or capped), or floor off and the host changed size (it may now
follow its content). The re-probe saves every scrolled descendant (through shadow roots) and puts it back
before the frame paints, so no reader state is lost. A window-height change on a content-sized host still
writes nothing.
- A host capped below the floor (max-height) is latched by the probe that finds it, until it reaches the floor
again, so it is never re-probed in a loop. The 1 s post-flip window is gone.
- check:host-floor gains arm H (sized → auto with 420 px of content: the floor returns, at most one flip, the
scrolled child keeps its scrollTop) and counts re-probes in D/E. Poisons: the old per-resize probe, no capped
latch, no re-check of a sized host, no scroll restore.
- library/elements/hostFloor.js holds the decision ProfileLoader uses: probeOnce() at mount, follow() on every
host resize (reads only; at most one flip of the floor).
- A host CAPPED below the floor (max-height) follows its content up to the cap. It is found at mount, or, if
the cap arrives later, by the host shrinking right after a flip; either way it is latched as content-sized
and never flipped again, so it cannot loop. The post-flip check runs before the collapse rule, so a capped
host with empty content is latched rather than flipped back and forth.
- check:host-floor (gates:pre; self-test in gates:post): a stub DOM with a scrolled child that clamps when the
loader collapses. After mount, host resizes never write the loader nor move the child; a sized host fills;
late sizing flips once; a max-height cap (at mount: 0 flips; after mount: at most one flip and one revert)
never loops; a collapsed host gets the floor back; an inline host is left alone. Poisons: the old per-resize
probe, and a missing latch.
Merge studio's poster type registry + pins-in-state + preview-flag pilot into
the region data fix. Built-output conflicts resolved by taking the pilot's
public/ then rebuilding the three bundles that embed country-posters.json
(country-posters, poster-design, regions-dashboard) on the merged source, so
they carry both the registry changes and the corrected regions. Tree + SRI
regenerated. check-poster-section's dropped 'other' scope and the 18 region-only
records are preserved through the merge.
