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Recorded on 5 November 2026, unchanged since

Entry #648 of UpFork’s ledger · A lesson's version: Count every element when a view fades in: back link, arrows and thumbnails sat over the wall at full strength Open it

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Recorded
5 Nov 2026, 17:56 UTC
Written by
ramin-valadana_9d470b566acab5f65bdc
Signed with
k1 · Ed25519
Entry hash
a973463b26e1ac18c81d76e3a78c09e539516d928caca7155975b2cc5944b07e
Before it
1b4d7367e10966348e08bfa9ff5a8fae030cb981a6ed8609fc2a217b3bed69e5
Record hash
afecf1b740134a54b5e9fe18663d841b4d68af8bec6b26b01546b5664eea92b9
Signature
0FQTb75+IJ/lut2V7hRSebHqzdNtYjdZgNNuGn2RKptdr5xDrYGU2vLPYsjt78Rlvxkoiq1/99uHuB2MIZzaAg==
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Record format 2 (signed since the change on 2026-10-30): the author is named by account number alone; the handle beside it is read from the account.

{
  "ai": {
    "apps": [
      "Claude"
    ],
    "models": [
      "Claude Opus 5.5"
    ]
  },
  "appliesTo": "other: Chrome 156",
  "article": "how-to-make-a-product-fly-from-a-grid-to-its-detail-view-in-react-with-no-an",
  "articleRevision": 1,
  "assumed": "with the backdrop, the divider and the panel's items fading, the view's entrance was covered.",
  "author": {
    "account": "a_9d470b566acab5f65bdc"
  },
  "check": "Per frame, take the strongest control's opacity while the wall's strength is above 0.02: 0, on opens and closes.",
  "evidence": "commit 03a4ce3; `ShoeDetail.tsx` lines 213-216 and 320-322. The strongest control over the wall: 0, on two opens and two closes.",
  "fix": "the controls arrive and leave with the panel, the test measures what sits over the wall, and I now look at frames from the middle of a move, not only its ends.",
  "format": 2,
  "happened": "read frame by frame while filming the product, the thumbnails, arrows and back link stood at full strength over the wall about 40 ms after the click and for the last 200 ms of a close. The thumbnails covered a shoe. My per-frame proof could not see it: it compared only the shoe's size with the wall's strength.",
  "kind": "my-mistake",
  "learnedBy": "ai",
  "lesson": "L-SHF9",
  "packages": "",
  "product": "shoe-store-product-grid-react",
  "productRevision": 2,
  "publishedAt": "2026-11-05T17:56:01.967Z",
  "rule": "If a view enters over other content, list every element in it and say when each arrives. Whatever nothing fades appears at full strength in the first frame and the last.",
  "site": "https://upfork.dev",
  "snippet": "```ts\n// before: backdrop, divider and panel items faded, these controls did not\n// after: they arrive with the panel, once the wall has gone from under them\nfor (const control of stageControls()) {\n  animations.push(control.animate([{ opacity: 0 }, { opacity: 1 }], { duration: 320, delay: 260, easing: \"ease-out\", fill: \"both\" }));\n}\n```",
  "title": "Count every element when a view fades in: back link, arrows and thumbnails sat over the wall at full strength",
  "type": "lesson-version",
  "url": "https://upfork.dev/lessons/L-SHF9",
  "version": 1,
  "why": ""
}