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host: no flash on relate/unrelate — server-render the picker's first page
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Relating/removing re-renders the kind's editor (outerHTML); the swapped-in picker's
results <ul> was empty and only filled after its 'load' fetch, so the candidate list
briefly emptied (a visible flash). Render the first page of candidates INTO the
results <ul> server-side (host/blog--relation-editor builds it inline via cons, the
same splice pattern the current-relations list uses), so the re-rendered picker
arrives already populated; the 'load' trigger then re-fetches the same page and
morphs it in place — invisible. No empty state, no flash.

Rendered inline rather than via the ~relate-picker component because component args
are evaluated, so pre-built candidate li-trees can't be spliced through one (they'd
be applied as calls). The component is left in place but unused.

Server-side only — the client engine (orchestration.sxbc, last commit's re-bind fix)
is unchanged. host conformance 278/278 (new: editor server-renders candidates), web
engine suite 8/8, run-picker-check 3/3.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
This commit is contained in:
giles
2026-06-29 20:50:40 +00:00
parent 268e91cd5d
commit 339235a2b5
2 changed files with 47 additions and 7 deletions
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8
lib/host/tests/blog.sx
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@@ -281,6 +281,14 @@
(contains? html "input delay:200ms, load")
(contains? html "rp-related-results")))
(list true true true))
;; the editor server-renders the first page of candidates INTO the picker's results
;; <ul>, so a re-rendered editor is never briefly empty (no flash). The candidate row
;; for an existing post appears inside the results ul.
(host-bl-test "editor server-renders the first page of candidates into the picker"
(let ((html (render-page (host/blog--relation-editor "alpha-post" "related"))))
(list (contains? html "id=\"cand-related-") ;; a candidate row is present
(contains? html "Beta Post"))) ;; an unrelated post is offered
(list true true))
;; Paging is server-driven: a full page carries a "load more" sentinel that, when
;; revealed, GETs the next page and replaces itself (outerHTML), preserving q.
(host-bl-test "load-more sentinel: revealed, outerHTML-swap, next offset, preserved q"