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otel: sustained SPA poll via a hidden ticker sibling (browser-verified)

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giles
2026-07-02 09:34:20 +00:00
parent 2785a14ece
commit e49229c20b
1 changed files with 8 additions and 6 deletions
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14
lib/host/otel.sx
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@@ -505,12 +505,14 @@
(div :id "otel-dashboard"
(h1 "OpenTelemetry")
(p :style "font-size:0.8em;opacity:0.7" "live · refreshes every 3s in-app")
;; STABLE polling element: it fetches GET /otel/fragment every 3s and swaps
;; its OWN inner content (innerHTML), so #otel-body itself is never removed —
;; its poll interval keeps firing (an outerHTML self-swap would delete the
;; polling element after one tick). Boosted → text/sx, so no full reload.
(div :id "otel-body" :sx-get "/otel/fragment" :sx-trigger "every 3s" :sx-swap "innerHTML"
(unquote (otel/-dashboard-body)))))))
;; HIDDEN POLLER: a sibling that is never itself a swap target, so the swap's
;; dispose pass never touches it and its poll interval keeps firing. It GETs
;; /otel/fragment every 3s and swaps the SIBLING #otel-body's inner content.
;; (Polling the body element itself died after ~2 ticks — the innerHTML swap's
;; dispose-islands-in disposed the poll's own callback.)
(span :sx-get "/otel/fragment" :sx-trigger "every 3s" :sx-target "#otel-body"
:sx-swap "innerHTML" :style "display:none")
(div :id "otel-body" (unquote (otel/-dashboard-body)))))))
;; ── routes ────────────────────────────────────────────────────────────
;; Dual-mode, wired into the SPA: a boosted (SX-Request) fetch — a link click OR