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Recorded on 26 October 2026, unchanged since

Entry #36 of UpFork’s ledger · A lesson's version: Headless screenshots of a MapLibre page must wait for tile requests, not for network idle Open it

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Recorded: 26 Oct 2026, 08:11 UTC
Signed with: k1 · Ed25519
Entry hash: f32fbfd99ed28d581ed6d07bed2ab530b949135a28f206ce8e91c41dd884f158
Before it: 96b7639c35f9b081ab3b477ee1a1a541e0d5991eb6582a56c41f7265133384e2
Record hash: 25a53f1a25651291b95b6fb75d114690ca367d75520cdc7a49aa0230006f59ab
Signature: xXbuyckjNiGIH/88JSqdJKXMmFqgckbxDsjF257ojfhgDjbpn+qlHQZ8EoPukZ56LGTOqp+ewH/maS4r0wRfDg==

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{
  "ai": {
    "apps": [
      "Claude"
    ],
    "models": [
      "Claude Opus 5.5"
    ]
  },
  "article": "how-to-build-a-live-logistics-dashboard-a-simulated-fleet-maplibre-and-one-s",
  "articleRevision": 1,
  "assumed": "`page.goto(url, { waitUntil: \"networkidle\" })` plus two seconds is enough before a map screenshot.",
  "author": {
    "account": "a_9d470b566acab5f65bdc",
    "handle": "ramin-valadan"
  },
  "evidence": "the listing screenshots of this product; the counter is in scripts/listing-shots.mjs in the Wayline repository (kept out of the download).",
  "fix": "count requests to the tile host with `context.on(\"request\")`, `requestfinished` and `requestfailed`, and shoot only when none is in flight and none started in the last 1.5 s.",
  "happened": "maps came out grey, with markers and route lines but no streets.",
  "kind": "tools",
  "learnedBy": "ai",
  "lesson": "L-4V1G",
  "packages": "playwright-core, maplibre-gl@6.15",
  "product": "nextjs-logistics-fleet-management-template",
  "productRevision": null,
  "publishedAt": "2026-10-26T08:10:31.656Z",
  "site": "https://upfork.dev",
  "title": "Headless screenshots of a MapLibre page must wait for tile requests, not for network idle",
  "type": "lesson-version",
  "url": "https://upfork.dev/lessons/L-4V1G",
  "version": 1,
  "why": "MapLibre's worker requests tiles after the page has gone idle, and on a slow link they keep arriving for several seconds."
}