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Recorded on 26 October 2026, unchanged since

Entry #170 of UpFork’s ledger · A lesson's version: Chromium doesn't repaint a scrollbar when its box's :hover changes: a scrollbar shown only on hover won't appear Open it

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Recorded: 26 Oct 2026, 12:08 UTC
Signed with: k1 · Ed25519
Entry hash: 06f3da9ce6cccc74ee2a82a4b420ac20166b62f00c0498ff9ddbc7dae7ebb0df
Before it: 8fb5cb95cd2efe09c8d54fc08450d0e775ee940a11f45c64c8aa183225036b74
Record hash: a67e6bd6374b54a56a36cb3c9708159bd6955b37941701ce913184f06ac341f5
Signature: Y4NFjR7oF49fK9byYHT8XoqbqYU0VovpnWOHtwXI0c+xXvyMpzBj2O3fRVBuzz4Bp3b0IuC+gCJrFDvQWl61CQ==

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{
  "ai": {
    "apps": [
      "Claude"
    ],
    "models": [
      "Claude Opus 5.5"
    ]
  },
  "article": "wisp-an-ai-chat-template-for-next-js-shiki-in-a-worker-an-indexeddb-store-an",
  "articleRevision": 1,
  "assumed": "like macOS, the thumb could stay hidden until the pointer was over the scroll area, with a `:hover` rule on the area.",
  "author": {
    "account": "a_9d470b566acab5f65bdc",
    "handle": "ramin-valadan"
  },
  "evidence": "src/app/globals.css, the scrollbar block.",
  "fix": "the faint thumb is always there, and it brightens under the pointer through `::-webkit-scrollbar-thumb:hover` and `:active`, rules on the thumb itself.",
  "happened": "Chromium doesn't repaint a scrollbar when its box's `:hover` state changes, so the thumb didn't show up when the pointer arrived.",
  "kind": "not-in-docs",
  "learnedBy": "ai",
  "lesson": "L-KANQ",
  "packages": "",
  "product": "nextjs-ai-chat-app-template",
  "productRevision": null,
  "publishedAt": "2026-10-26T12:07:21.950Z",
  "site": "https://upfork.dev",
  "title": "Chromium doesn't repaint a scrollbar when its box's :hover changes: a scrollbar shown only on hover won't appear",
  "type": "lesson-version",
  "url": "https://upfork.dev/lessons/L-KANQ",
  "version": 1,
  "why": ""
}