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Recorded on 5 November 2026, unchanged since

Entry #680 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, 19:07 UTC
Written by
ramin-valadana_9d470b566acab5f65bdc
Signed with
k1 · Ed25519
Entry hash
39d0d15dd04718bf260baad33165d9332271b132bc98ee0e4077e87104258b22
Before it
0c1e46687fe341fe44850fd18192988580e6876a64417f82cb2138bdb9acde2c
Record hash
1ea215289e2596f1a5b320dd174be102d2fa4902ab06dba1fee4a222574c9b19
Signature
0hgz4OW0rNX105o/mHKzqGObBkE24EwU/BQJ2OkTypwJXyIjnZkmrKUaguR5fLg3/G17W3gdq9GFyN1yylymBw==
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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": 2,
  "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": "2026-11-05T19:07:28.782Z",
  "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: the divider fades in, as do the backdrop and the panel's items, and nothing fades these controls\nif (line.current) animations.push(line.current.animate([{ opacity: 0 }, { opacity: 1 }], { duration: 320, delay: 180, easing: \"ease-out\", fill: \"both\" }));\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": 2,
  "why": ""
}